1. Management method of a plurality of batteries (B1-B4) housed in a tool or vehicle (100), the method comprising: i) a selection step, a first part (B1) of said plurality of batteries (B1 -B4) being selected in said selection step; ii) a charging step, said first part (B1 ) of said plurality of batteries (B1 -B4) being selectively charged in said charging step; iii) at least one further selection step, a further part (B2, B3, B4) of said plurality of batteries (B1 -B4) being selected in said further selection step and iv) at least one further charging step, said further part (B2, B3, B4) of said plurality of batteries (B1-B4) being selectively charged in said further charging step.

2. Method according to claim 1 , wherein said tool or vehicle (100) is a tool or vehicle for gardening or agriculture.

3. Method according to claim 1 or claim 2, wherein said tool or vehicle (100) is lawnmower tractor,

4. Method according to any one of claims 1 to 3, wherein said further charging step is executed upon the completion of said charging step.

5. Method according to any one of claims 1 to 4, wherein said method further comprises a power supply step, at least one power user (101 , 102) of said tool or vehicle (100) being supplied in said supply step by means of a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1) of said plurality of batteries (B1 -B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1-B4).

6. Method according to any one of claims 1 to 5, wherein said at least one power user (101 , 102) of said tool or vehicle (100) is supplied in said power supply step by a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from each battery of said plurality of batteries (B1 -B4).

7. Method according to any one of claims 1 to 6, wherein the selection step of said first part (B1) or said further part (B2, B3, B4) of the plurality of batteries (B1-B4) comprises the transmission, from a control unit (10) and by means of at least one charge enabling control line (14) operatively connected with a control input of said plurality of batteries (B1-B4), of a control signal intended to select said first part (B1) of said plurality of batteries (B1 -B4) or said further part (B2, B3, B4) of said plurality of batteries (B1-B4) to cause a switching of a supply controller or switch (44) of the first part (B1) or of the further part (B2, B3, B4) of said plurality of batteries (B1 -B4) so that a flow of electrical energy from a power supply (30) can determine the charging thereof.

8. Method according to any one of claims 1 to 7, wherein the selection step of said first part (B1) or said further part (B2, B3, B4) of the plurality of batteries (B1-B4) comprises the transmission, from the control unit (10) and through a control line of a plurality of charge enabling control lines (14) each operatively connected with a control input of a respective battery of said plurality of batteries (B1 -B4), of a control signal intended to select a specific battery of said plurality of batteries (B1 -B4) to cause a switching of a supply controller or switch (44) of said specific battery, so that a flow of electrical energy from a power supply (30) can determine the charging thereof.

9. Method according to any one of claims 1 to 8, comprising a step of detecting the charge of said first part (B1 ) of said plurality of batteries (B1 -B4) by means of at least one charge sensor, wherein the method comprises an interruption of the charging of the first part (B1 ) of said plurality of batteries (B1 -B4) when said charge sensor detects a charge, in particular a voltage, which is greater with respect to a predetermined threshold value, and wherein the interruption of the charging automatically determines the step of selecting the further part (B2, B3, B4) of said plurality of batteries (B1-B4) and a step of de-selecting said first part (B1) of said plurality of batteries (B1-B4).

10. Method according to any one of claims 1 to 9, comprising an interruption of the charging of the first part (B1) of said plurality of batteries (B1-B4) when said charge sensor detects a higher voltage with respect to a predetermined threshold value.

1 1 . Method according to any one of claims 1 to 10, comprising a step of electronically detecting a charging current value supplied to said at least one part (B1) of the plurality of batteries (B1-B4) during the battery charging step, wherein the method comprises interrupting the charging of said at least a first part (B1) of the plurality of batteries (B1-B4) when the current value exceeds a certain maximum safety value (l_max).

12. Method according to any one of claims 1 to 11 , comprising a step of electronically detecting a value of a charging current supplied to said at least one part (B1) of the plurality of batteries (B1 -B4) during the battery charging step, wherein the method comprises interrupting the charging of said at least a first part (B1) of the plurality of batteries (B1-B4) when the current value falls below a minimum charging current value (l_min), said maximum safety value (l_max) being greater than said minimum charging current value (l_min).

13. Method according to any one of claims 1 to 12, comprising an immediate interruption of the charging step when the charging current value is greater than said maximum safety value (l_max).

14. Method according to any one of claims 1 to 13, comprising an interruption of the charging step when the charging current value remains below said minimum charging current value (lmin) for a time longer than a certain waiting time (Tw).

15. Method according to any one of claims 1 to 14, wherein the selection step comprises an electronic selection of said at least a first part (B1) of said plurality of batteries (B1 -B4), said selection comprising a transmission of a selection command on at least one control line (14) connected with at least one among said first part (B1) and said further part (B2, B3, B4) of the plurality of batteries (B1-B4); said control line (14) terminating on a control input (15) of at least one among said first part (B1) and said further part (B2, B3, B4) of the plurality of batteries (B1 -B4).

16. Method according to any one of claims 1 to 15, wherein the selection step comprises an electronic selection of said at least a first part (B1 ) of said plurality of batteries (B1-B4) and of at least one further part (B2, B3, B4) of said plurality of batteries (B1-B4), said selection comprising a transmission of a selection command on at least one control line (14) connected with at least one among said first part (B1) and said further part (B2, B3, B4) of the plurality of batteries (B1 -B4); said control line (14) terminating on a control input (15) of at least one of said first part (B1) and said further part (B2, B3, B4) of the plurality of batteries (B1-B4).

17. Method according to any one of claims 1 to 16, wherein said selection comprises transmitting a selection command on a control line (14) uniquely associated with a battery of the plurality of batteries (B1-B4) which is intended to be charged.

18. Method according to any one of claims 1 to 17, comprising an electronic malfunction detection step.

19. Method according to any one of claims 1 to 18, wherein said electronic malfunction detection step is or comprises a detection of a current entering to at least one of the batteries (B1-B4) during said power supply step.

20. Method according to any one of claims 1 to 19, comprising a verification step of an improper operating condition, performed on each battery of the plurality of batteries (B1-B4).

21 . Method according to any one of claims 1 to 20, wherein said verification step of an improperoperating condition is performed automatically on each battery of the plurality of batteries (B1 -B4).

22. Method according to any one of claims 1 to 21, comprising an exclusion step of at least one battery selected from the batteries of the plurality of batteries (B1 -B4) when for said at least one battery of the plurality of batteries said malfunction and/or said improper operating condition is detected; the exclusion step determining the exclusion of said selected battery from the power supply step.

23. Method according to any one of claims 1 to 22, wherein said malfunction comprises at least one of a lower operating voltage with respect to a first lower or higher threshold with respect to a second upper threshold.

24. Method according to any one of claims 1 to 23, wherein said malfunction comprises at least one lower operating temperature with respect to a first lower or higher threshold with respect to a second upper threshold.

25. Method according to any one of claims 1 to 24, wherein the verification step of an improper operating condition comprises a step of verifying a voltage imbalance (AV(B_n, B_n+iy) and/or a charge level imbalance between at least a first battery (Bn) and a second battery (Bn+i) of said plurality of batteries (B1 - B4).

26. Method according to any one of claims 1 to 25, wherein the verification step of said voltage imbalance ( V B_n, B_n+i))' and/or said charge level imbalance comprises a comparison, in particular an electronic comparison, between a charge level difference between said at least a first battery (Bn) and a second battery (Bn+i) and a first reference value (V_vi).

27. Method according to any one of claims 1 to 26, wherein the verification step of said voltage imbalance ( V B_n, B_n+i))' and/or said charge level imbalance (ASoC(F„, /?„+,)) comprises a comparison, in particular an electronic comparison, between a voltage imbalance between said at least a first battery (Bn) and a second battery (Bn+i) and a second reference value (V_V2).

28. Method according to any one of claims 1 to 27, comprising a step of selecting and/or limiting a maximum electrical power deliverable by each battery of the plurality of batteries (B1-B4), said selecting and/or limiting being an electronic selection and/or limitation, respectively, the step of selecting and/or limiting the maximum power comprising transmitting a power management signal to a switch of at least one battery selected from the batteries of said plurality of batteries (B1-B4).

29. Method according to any one of claims 1 to 28, wherein said transmission of a power management signal is performed selectively and/or independently for each of the plurality of batteries (B1-B4).

30. Method according to any one of claims 1 to 29, wherein said switch is a bidirectional power switch.

31. Method according to any one of claims 1 to 30, comprising a step of enabling a power supply and/or an actuation of at least one primary power user (102) among the plurality of power users (101 , 102), or of a power supply and/or an actuation of a primary power user (102) and a secondary power user (101 ) among the plurality of power users (101 , 102), as a function of a number n of batteries (B1 -B4).

32. Method according to any one of claims 1 to 31 , wherein said enabling step is such that, as long as the number n of batteries (B1 -B4) is less than a first number I of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102), the power supply and/or actuation of the primary power user (102) and the secondary power user (101) is denied.

33. Method according to any one of claims 1 to 32, wherein said enabling step is such that, as long as the number n of batteries (B1-B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and less than a second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power actuator (101), said second number k being greater than said first number I, the power supply and/or the actuation of the primary power user (102) is allowed and the power supply and/or actuation of the secondary power user (101 ) is denied.

34. Method according to any one of claims 1 to 33, wherein said enabling step is such that, as long as the number n of batteries (B1 -B4) is equal to or greater than said second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power user (101 ), the power supply and/or actuation of the primary power user (102) and the secondary power user (101 ) is authorised.

35. Control unit (10) for managing the charging and discharging of a plurality of batteries (B1-B4) housed in a tool or vehicle (100), wherein the control unit (10) is configured to be in use operatively interposed between the plurality of batteries (B1 -B4) and at least one power user (101 , 102) of the tool or vehicle (100) and comprising:

- a charging operating configuration, wherein said control unit (10):

- selects a first part (B1 ) of said plurality of batteries (B1 -B4),

- causes a selective charging, in particular by a power supply (30) of said first part (B1) of said plurality of batteries (B1-B4),

- selects a further part (B2, B3, B4) of said plurality of batteries (B1 -B4) and

- causes a selective charging, in particular by a power supply (30) of said further part (B2, B3, B4) of said plurality of batteries (B1 -B4),

- a power supply operating configuration, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1) of said plurality of batteries (B1 -B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1 -B4),

36. Control unit according to claim 35, wherein said tool or vehicle is a tool or vehicle for gardening or agriculture.

37. Control unit according to claim 35 or claim 36, wherein said tool or vehicle is a lawnmower tractor.

38. Control unit according to any one of claims 35 to 37, wherein the charging of said further part (B2, B3, B4) of said plurality of batteries (B1-B4) is enabled only upon completion of the charging of said first part (B1) of said plurality of batteries (B1-B4).

39. Control unit according to any one of claims 35 to 38, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from each battery of said plurality of batteries (B1- B4).

40. Control unit according to any one of claims 35 to 39, comprising at least one charge enabling control line (14), operatively connected with a control input of said plurality of batteries (B1-B4), said control unit (10) being configured to select said first part (B1) of said plurality of batteries (B1 -B4) or to select said further part (B2, B3, B4) of said plurality of batteries (B1 -B4) by transmitting, in use, a control signal on said at least one control line (14), said control signal being intended to cause a switching of a supply controller or switch (44) of the first part (B1) or of the further part (B2, B3, B4) of said plurality of batteries (B1 -B4) so that a flow of electrical energy from said power supply (30) can determine the charging thereof.

41 . Control unit according to any one of claims 35 to 40, wherein said control unit comprises a plurality of charge enabling control lines (14), each operatively connected with a control input of a respective battery of said plurality of batteries (B1 -B4); said control unit (10) being configured to select a specific battery of said plurality of batteries (B1 -B4) by transmitting, in use, a control signal on one of said control lines (14), said control signal being intended to cause a switching of a supply controller or switch (44) of the specific battery so that a flow of electrical energy from said power supply (30) can determine the charging thereof.

42. Control unit according to any one of claims 35 to 41 , wherein said control unit is configured to electronically select said at least a first part (B1 ) of said plurality of batteries (B1-B4) or, optionally, the at least one further part (B2, B3, B4) of said plurality of batteries (B1-B4); said control unit (10) being configured to transmit a selection command on at least one control line (14) connected with at least one among said first part (B1) and said further part (B2, B3, B4) of the plurality of batteries (B1 -B4); said control line (14) terminating on a control input (15) of at least one among said first part (B1) and said further part (B2, B3, B4) of the plurality of batteries (B1 -B4).

43. Control unit according to any one of claims 35 to 42, wherein said control unit (10) is configured to transmit a selection command on a control line (14) uniquely associated with a battery of the plurality of batteries (B1-B4) which is intended to be charged.

44. Control unit according to any one of claims 35 to 43, comprising at least one charge sensor, in particular a voltage sensor, electrically connected with a respective battery of said plurality of batteries (B1 -B4), wherein the control unit (10) is configured to cause an interruption of the charge of the first part (B1) of said plurality of batteries (B1 -B4) when said charge sensor detects a charge, in particular a voltage, which is greater with respect to a predetermined threshold value, and to automatically cause the selection of the further part (B2, B3, B4) of said plurality of batteries (B1-B4) and a de-selection of said first part (B1) of said plurality of batteries (B1-B4).

45. Control unit according to any one of claims 35 to 44, comprising at least one charge sensor, in particular a current sensor, electrically connected with at least one respective battery of said plurality of batteries (B1-B4), said control unit (10) being configured to electronically detect, by means of said charge sensor, a charging current value supplied to said at least one part (B1) of the plurality of batteries (B1-B4) during the charging operating configuration.

46. Control unit according to any one of claims 35 to 45, wherein the control unit (10) is configured to terminate said charging operating configuration of said at least one part (B1 ) of the plurality of batteries (B1 -B4) when the current value exceeds a certain maximum safety current value (l_max) and/or falls below a minimum charging current value (l_min).

47. Control unit according to any one of claims 35 to 46, wherein the control unit is configured to terminate said charging operating configuration of said at least one part (B1 ) of the plurality of batteries (B1-B4) immediately, when the charging current value is greater than said maximum safety value (l_max).

48. Control unit according to any one of claims 35 to 47, wherein the control unit is configured to terminate said charging operating configuration of said at least one part (B1) of the plurality of batteries (B1-B4) following a time greater than a certain waiting time (Tw), if the charging current value remains below said minimum charging current value (Imin) for said waiting time (Tw).

49. Control unit according to any one of claims 35 to 48, configured to execute an electronic malfunction control and/or electronic control of an improper operating condition, optionally performed automatically, on each battery of the plurality of batteries (B1-B4); the control unit (10) being configured to exclude at least one battery selected among the batteries of the plurality of batteries (B1-B4) when said malfunction and/or said improper operating condition is detected for said at least one battery of the plurality of batteries; the exclusion determining the exclusion of said selected battery from the power supply step.

50. Control unit according to any one of claims 35 to 49, wherein said malfunction comprises a lower operating voltage with respect to a first lower threshold or higher with respect to a second upper threshold.

51. Control unit according to any one of claims 35 to 50, wherein said malfunction comprises a lower operating temperature with respect to a first lower or higher threshold with respect to a second upper threshold.

52. Control unit according to any one of claims 35 to 51 , wherein, in said electronic control of said improper operating configuration the control unit (10) is configured to verify a voltage imbalance ( V B_n, B_n+i))' and/or a charge level imbalance B_n+i))' between at least a first battery (Bn) and a second battery (B_n+i) of said plurality of batteries (B1 -B4).

53. Control unit according to any one of claims 35 to 52, wherein said voltage imbalance (At/ (B_n, B_n+i)) and/or said charge level imbalance (ASoC(F„, /?„+,)) between at least a first battery (Bn) and a second battery (_Bn+i) of said plurality of batteries (B1 -B4) is verified by executing a comparison, in particular an electronic comparison, between a charge level difference B_n+i))' between said at least a first battery (Bn) and a second battery (sn+i) and a first reference value (V_vi).

54. Control unit according to any one of claims 35 to 53, wherein said voltage imbalance (At/ (B_n, B_n+i))' and/or said charge level imbalance (ASoC (B_n, B_n+i))' between at least a first battery (Bn) and a second battery (B_n+i) of said plurality of batteries (B1 -B4) is verified by executing a comparison, in particular an electronic comparison, between a voltage imbalance (At/ (B_n, B_n+i))' between said at least a first battery (Bn) and a second battery (BD-H) and a second reference value (V_V2).

55. Control unit according to any one of claims 35 to 54, wherein said control unit is specifically intended to cause a selection and/or a limitation, in particular an electronic selection and/or limitation, of a maximum electrical power deliverable by each battery of the plurality of batteries (B1-B4) and wherein said control unit (10) is configured to transmit, in particular selectively and/or independently for each battery of the plurality of batteries (B1 -B4), a power management signal to a switch, in particular a bidirectional power switch, of at least one selected battery of said plurality of batteries (B1-B4).

56. Control unit according to any one of claims 35 to 55, wherein said control unit (10) is configured to selectively and/or independently transmit said power management signal for each battery of the plurality of batteries (B1-B4).

57. Control unit according to any one of claims 35 to 56, wherein said switch is a bidirectional power switch.

58. Control unit according to any one of claims 35 to 57, wherein said control unit (10) is configured to enable a power supply and/or an actuation of at least one primary power user (102) among the plurality of power users (101, 102), or a power supply and/or an actuation of a primary power user (102) and a secondary power user (101 ) among the plurality of power users (101 , 102), as a function of the number n of batteries (B1-B4).

59. Control unit according to any one of claims 35 to 58, wherein the configuration of said control unit (10) is such that, as long as the number n of batteries (B1-B4) is less than a first number i of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102), the power supply and/or actuation of the primary power user (102) and the secondary power user (101) is denied.

60. Control unit according to any one of claims 35 to 59, wherein the configuration of said control unit (10) is such that, as long as the number n of batteries (B1-B4) is equal to or greater than said first number i of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and less than a second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power actuator (101), said second number k being greater than said first number i, the power supply and/or the actuation of the primary power user (102) is allowed and the power supply and/or actuation of the secondary power user (101) is denied.

61. Control unit according to any one of claims 35 to 60, wherein the configuration of said control unit (10) is such that, as long as the number n of batteries (B1-B4) is greater than said second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power user (101 ), the power supply and/or actuation of the primary power user (102) and the secondary power user (101) is authorised.

62. Lawnmower tractor, comprising a plurality of batteries (B1 -B4) and a control unit (10), said control unit (10) being configured for managing the charging and discharging of a plurality of batteries (B1-B4), said control unit (10) being in particular according to any one of claims 35 to 61 , said lawnmower tractor comprising a first compartment (V1), a second compartment (V2) and a third compartment (V3), wherein, given a plane of symmetry of said lawnmower tractor, said first compartment (V1) and said second compartment (V2) are arranged in opposite regions of said lawnmower tractor with respect to said plane of symmetry and said third compartment (V3) is arranged in a region of said lawnmower tractor located at said plane of symmetry, wherein said first compartment (V1) houses at least a first battery of said plurality of batteries (B1-B4), said second compartment (V2) houses at least a second battery of said plurality of batteries (B1 -B4) and said third compartment (V3) houses at least one device belonging to said control unit (10), and wherein said first compartment (V1) and said second compartment (V2) are accessible to a user of said lawnmower tractor, in order to execute operations such as insertion and/or extraction and/or replacement of batteries.

63. Lawnmower tractor according to claim 62, wherein said at least one device is enclosed by a casing (28).

64. Lawnmower tractor according to claim 62 or claim 63, wherein said first compartment (V1) and said second compartment (V2) are accessible to a user of said lawnmower tractor after switching in the position of respective closing doors of said first compartment (V1 ) and said second compartment (V2).

65. Control method of a tool or vehicle (100) for gardening or agriculture, wherein said tool or vehicle (100) comprises at least one power user (101 , 102) and a power supply circuit configured to electrically power said at least one power user (101, 102), wherein at least one among a first battery (B1) and/or a second battery (B2) of a plurality of batteries (B1-B4) is configured to be installed on board said tool or vehicle (100), said at least one among said first battery (B1) and said second battery (B2), when installed on board said tool or vehicle (100), contributing to electrically power said at least one power user (101, 102) by means of said power supply circuit, wherein the method comprises:

- an electronic measurement step of an electrical power (P(t)) instantly absorbed by said at least one power user (101, 102), wherein the electronic measurement step of the instantly absorbed power (P(t)) is executed by a control unit (10) configured to control the power supply of said at least one power user (101 , 102) or is executed by an electric or electronic sensor, operatively connected with said control unit (10), and

- an electronic limitation step of the electrical power supplied by said at least a first battery (B1) and/or by said at least a second battery (B2), to said at least one power user (101 , 102) by means of the power supply circuit, said electronic limitation step determining a limitation of the electrical power supplied by said at least a first battery (B1) and/or by said at least a second battery (B2) to at least a first maximum power value.

66. Method according to claim 65, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower tractor.

67. Method according to claim 65 or claim 66, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower robot,

68. Method according to any one of claims 65 to 67, wherein at least one among a first battery (B1) and/or a second battery (B2) of a plurality of batteries (B1-B4) is configured to be removably installed on board said tool or vehicle (100).

69. Method according to any one of claims 65 to 68, wherein the first battery (B1 ) and the second battery (B2) are electrically connected in parallel to supply the at least one power user (101 , 102) by means of said power supply circuit.

70. Method according to any one of claims 65 to 69, wherein the method comprises a step of storing at least one datum related to a maximum electrical power deliverable by at least one among said first battery (B1 ) and said second battery (B2).

71 . Method according to any one of claims 65 to 70, wherein the method comprises a step of storing a first datum related to the maximum power deliverable by said first battery (B1) and a second datum related to the maximum power deliverable by said second battery (B2).

72. Method according to any one of claims 65 to 71 , wherein the method comprises a step of electronically retrieving at least one datum related to a maximum electrical power deliverable by at least one among said first battery (B1) and said second battery (B2).

73. Method according to any one of claims 65 to 72, wherein the method comprises a step of electronically retrieving a first datum related to the maximum power deliverable by said first battery (B1 ) and said second datum related to the maximum power deliverable by said second battery (B2).

74. Method according to any one of claims 65 to 73, wherein said at least one maximum power value corresponds to said datum.

75. Method according to any one of claims 65 to 74, wherein said at least one maximum power value corresponding to said first datum and/or to said second datum.

76. Method according to any one of claims 65 to 75, wherein the electronic limitation of the electrical power supplied by said first battery (B1) and/or by said second battery (B2) only occurs when the electrical power supplied to said at least one power user (101 , 102) exceeds the value corresponding to said datum.

77. Method according to any one of claims 65 to 76, wherein the electronic limitation of the electrical power supplied by said first battery (B1) and/or by said second battery (B2) only occurs when the electrical power supplied to said at least one power user (101 , 102) exceeds the value corresponding to said first datum and/or to said second datum.

78. Method according to any one of claims 65 to 77, wherein said electronic limitation step occurs immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding said at least one maximum power value.

79. Method according to any one of claims 65 to 78, wherein said electronic limitation step occurs immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one among at least a first maximum power value representative of the maximum power deliverable by said first battery (B1 ) and a second maximum power value representative of the maximum power deliverable by said second battery (B2).

80. Method according to any one of claims 65 to 79, wherein said electronic limitation step occurs when a power instantly requested by said at least one power user (101 , 102) causes exceeding said at least one maximum power value for at least one predetermined time interval (At_pmax).

81 . Method according to any one of claims 65 to 80, wherein said electronic limitation step occurs when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one among at least a first maximum power value representative of the maximum power deliverable by said first battery (B1) and a second maximum power value representative of the maximum power deliverable by said second battery (B2), for at least a predetermined time interval (Atpmax).

82. Method according to any one of claims 65 to 81 , wherein the limitation step comprises a transmission of a power limitation signal (Sum) to at least one power limitation circuit.

83. Method according to any one of claims 65 to 82, wherein said power limitation circuit is positioned within said first battery (B1).

84. Method according to any one of claims 65 to 83, wherein said power limitation circuit is positioned within said second battery (B2).

85. Method according to any one of claims 65 to 84, wherein said power limitation circuit is positioned and/or within said control unit (10).

86. Method according to any one of claims 65 to 85, wherein the at least one power user (101, 102) comprises a primary power user (102) and a secondary power user (101 ), wherein the method comprises a step of enabling a power supply and/or an actuation of the at least one primary power user (102), or a power supply and/or an actuation of the primary power user (102) and the secondary power user (101 ).

87. Method according to any one of claims 65 to 86, wherein, in the enabling step, an electronic control of at least one value among an electrical power, charge, voltage or current value, made available by the at least one battery connected to said power supply circuit, is executed.

88. Method according to any one of claims 65 to 87, wherein, in the enabling step, an electronic control of a number n of batteries (B1 -B4) installed on board said tool or vehicle (100) is executed.

89. Method according to any one of claims 65 to 88 wherein, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1 -B4), is electronically enabled, and optionally automatically:

- the electrical power supply, by means of said power supply circuit, of only the primary power user (102) or

- the electrical power supply, by means of said power supply circuit, of the primary power user (102) and the secondary power user (101).

90. Method according to any one of claims 65 to 89, comprising a step of electronically comparing a signal indicative of the temperature (t) assumed by at least one battery of said plurality of batteries (B1-B4) with a temperature threshold value (1TH), and a step of activating at least one fan for cooling said at least one battery of said plurality of batteries (B1 -B4) when the signal indicates a temperature (t) higher than said temperature threshold (t™).

91 . Method according to any one of claims 65 to 90, comprising a step of forcibly activating said at least one fan for cooling said at least one battery of said plurality of batteries (B1 -B4) when the electrical power (P(t)) instantly absorbed by said at least one power user (101 , 102) reaches a predefined power value requiring an active cooling.

92. Method according to any one of claims 65 to 91 , wherein said predetermined power value requiring an active cooling is greater than 2/3 of said maximum power value.

93. Method according to any one of claims 65 to 92, wherein said predetermined power value requiring an active cooling is equal to said maximum power value.

94. Method according to any one of claims 65 to 93, comprising a step of configuring a control unit (10), in use controlling at least one among an activation of an electrical power supply, a deactivation of the electrical power supply and an adjustment of the electrical power supplied by at least part of the plurality of batteries (B1-B4), in particular by at least one among the first battery (B1) and/or the second battery (B2), to said at least one power user (101 , 102), wherein, in said configuration step, the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of the electrical power supplied to said at least one power user (101 , 102).

95. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), configured to be electrically powered,

- at least one among a first battery (B1) and/or a second battery (B2) of a plurality of batteries (B1-B4), configured to be installed on board said tool or vehicle (100) and intended to power said at least one power user (101 , 102) by means of a power supply circuit, the control unit (10) being configured to be operatively connected with, or comprising, at least one electric or electronic sensor intended for measuring a power instantly absorbed (P(t)) by said at least one power user (101 , 102), wherein the control unit (10) is configured to limit to at least a first maximum power value an electrical power supplied by said at least a first battery (B1 ) and/or by said at least a second battery (B2), to said at least one power user (101 , 102) by means of the power supply circuit.

96. Control unit according to claim 95, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower tractor.

97. Control unit according to claim 95 or claim 96, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower robot,

98. Control unit according to any one of claims 95 to 97, wherein said at least one among a first battery (B1 ) and/or a second battery (B2) of a plurality of batteries (B1-B4) is configured to be removably installed on board said tool or vehicle (100).

99. Control unit according to any one of claims 95 to 98, wherein the first battery (B1) and the second battery (B2) are electrically connected in parallel to supply the at least one power user (101 , 102) by means of said power supply circuit.

100. Control unit according to any one of claims 95 to 99, wherein the control unit (10) is configured to store at least one datum related to a maximum electrical power deliverable by at least one among said first battery (B1 ) and said second battery (B2).

101. Control unit according to any one of claims 95 to 100, wherein the control unit (10) is configured to store a first datum related to the maximum power deliverable by said first battery (B1) and a second datum related to the maximum power deliverable by said second battery (B2).

102. Control unit according to any one of claims 95 to 101 , wherein the control unit (10) is configured to electronically retrieve said datum related to a maximum electrical power deliverable by at least one among said first battery (B1) and said second battery (B2).

103. Control unit according to any one of claims 95 to 102, wherein the control unit (10) is configured to electronically retrieve said first datum related to the maximum power deliverable by said first battery (B1 ) and said second datum related to the maximum power deliverable by said second battery (B2).

104. Control unit according to any one of claims 95 to 103, wherein said at least one maximum power value corresponds to said datum.

105. Control unit according to any one of claims 95 to 104, wherein said at least one maximum power value corresponding to said first datum and/or to said second datum.

106. Control unit according to any one of claims 95 to 105, wherein the control unit (10) is configured for electronically limiting the electrical power supplied by said first battery (B1) and/or by said second battery (B2) only when the electrical power supplied to said at least one power user (101 , 102) exceeds the value corresponding to said datum.

107. Control unit according to any one of claims 95 to 106, wherein the control unit (10) is configured to electronically limit the electrical power supplied by said first battery (B1 ) and/or by said second battery (B2) only when the electrical power supplied to said at least one power user (101 , 102) exceeds the value corresponding to said first datum and/or said second datum.

108. Control unit according to any one of claims 95 to 107, wherein said control unit (10) is configured to electronically limit the electrical power immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding said at least one maximum power value.

109. Control unit according to any one of claims 95 to 108, wherein said control unit (10) is configured to electronically limit the electrical power immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one among a first maximum power value representative of the maximum power deliverable by said first battery (B1) and a second maximum power value representative of the maximum power deliverable by said second battery (B2).

1 10. Control unit according to any one of claims 95 to 109, wherein said control unit (10) is configured to electronically limit the electrical power when a power instantly requested by said at least one power user (101 , 102) causes exceeding said at least one maximum power value for at least a predetermined time interval (At_pmax).

1 11. Control unit according to any one of claims 95 to 110, wherein said control unit (10) is configured to electronically limit the electrical power when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one among a first maximum power value representative of the maximum power deliverable by said first battery (B1) and a second maximum power value representative of the maximum power deliverable by said second battery (B2), for at least a predefined time interval (Atpmax).

1 12. Control unit according to any one of claims 95 to 11 1 , wherein the control unit (10) is configured to limit the electrical power by transmitting a power limitation signal (Siim) to at least one power limitation circuit.

1 13. Control unit according to any one of claims 95 to 112, wherein said power limitation circuit is positioned within said first battery (B1 ).

1 14. Control unit according to any one of claims 95 to 113, wherein said power limitation circuit is positioned within said second battery (B2).

1 15. Control unit according to any one of claims 95 to 114, wherein said power limitation circuit is positioned within said control unit (10).

1 16. Control unit according to any one of claims 95 to 115, wherein the at least one power user (101 , 102) comprises a primary power user (102) and a secondary power user (101), wherein the control unit (10) is configured to execute an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit and/or an electronic control of a number n of batteries (B1 - B4) installed on board said tool or vehicle (100), and wherein the control unit (10) is configured to enable electronically, and optionally automatically, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1-B4):

- the electrical power supply, by means of said power supply circuit, of only the primary power user (102); or

- the electrical power supply, by means of said power supply circuit, of the primary power user (102) and the secondary power user (101).

1 17. Control unit according to any one of claims 95 to 116, wherein said control unit (10) is configured to electronically compare a signal indicative of the temperature (t) taken by at least one battery of said plurality of batteries (B1-B4) with a temperature threshold value (tin), and transmit an activation signal to at least one fan for cooling said at least one battery of said plurality of batteries (B1-B4) when said signal indicates a temperature (t) higher than said temperature threshold (tin).

1 18. Control unit according to any one of claims 95 to 117, wherein said control unit (10) is configured to transmit an activation signal to at least one fan for cooling said at least one battery of said plurality of batteries (B1-B4) when the electrical power (P(t)) instantly absorbed by said at least one power user (101 , 102), reaches a predefined power value requiring an active cooling.

1 19. Control unit according to any one of claims 95 to 118, wherein said predetermined power value requiring an active cooling is greater than 2/3 of said maximum power value.

120. Control unit according to any one of claims 95 to 119, wherein said predetermined power value requiring an active cooling is substantially equal to said maximum power value.

121. Control unit according to any one of claims 95 to 120, configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1 -B4), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

122. Control unit according to any one of claims 95 to 121 , configured to allow the connection or disconnection of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

123. Vehicle for gardening or agriculture (100), said vehicle comprising at least one power user (101 , 102), a plurality of batteries (B1 -B4) electrically connected with said power user (101 , 102), and a control unit (10), said control unit being, in particular, according to any one of claims 95 to 122, wherein the at least one power user (101 , 102) comprises at least one traction motor (102) for the movement of said vehicle and a service motor for the operation of a cutting organ.

124. Method according to claim 123, wherein said vehicle for gardening or agriculture (100) is a lawnmower tractor.

125. Vehicle according to claim 123 or claim 124, wherein said vehicle for gardening or agriculture (100) is a lawnmower robot.

126. Vehicle according to any one of claims 123 to 125, wherein said cutting organ is a mowing plate or disc or bar or wire or blade (101).

127. Power supply method of at least one power user (101 , 102) of a tool or vehicle (100) for gardening or agriculture, wherein at least one battery (B1) installed on board said tool or vehicle (100) contributes to powering said at least one power user (101 , 102), wherein said method comprises a step of controlling the power supply of said at least one power user (101, 102) by means of at least one solid-state supply switch circuit (20s’), said supply switch circuit (20s’) being positioned in series to said at least one battery (B1), wherein the solid-state supply switch circuit (20s’) forms a unidirectional power switch, said supply switch circuit (20s’) being configured to be operatively switched between a closed configuration, which allows the passage of an electrical current from said at least one battery (B1-B4) to said at least one power user (101 , 102), and an open configuration, which prevents the passage of said electrical current from the at least one battery (B1) to said at least one power user (101 , 102), and wherein the power supply control step of said at least one power user (101 , 102) comprises at least one switching between said closed configuration of said supply switch circuit (20s’) and said open configuration of said supply switch circuit (20s’).

128. Method according to claim 127, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower tractor.

129. Method according to claim 127 or claim 128, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower robot.

130. Method according to any one of claims 127 to 129, wherein said supply switch circuit (20s’) is arranged between said at least one battery (B1 ) and said at least one power user (101 , 102).

131. Method according to any one of claims 127 to 130, wherein said supply switch circuit (20s’) is configured to allow the transit of an electrical current in only one direction.

132. Method according to any one of claims 127 to 131 , wherein said solid-state supply switch circuit (20s’) comprises at least a first field-effect transistor (201), at least a second field-effect transistor (202), a first diode (301 ) and a second diode (302).

133. Method according to any one of claims 127 to 132, wherein said at least a first field-effect transistor (201) is at least a first MOSFET (201) and wherein said at least a second field-effect transistor (202) is at least a second MOSFET (202).

134. Method according to any one of claims 127 to 133, wherein the first diode (301 ) is connected between a drain terminal (D1) and a source terminal (S1) of the first field-effect transistor (201) and wherein the second diode (302) is connected between a drain terminal (D2) and a source terminal (S2) of the second field-effect transistor (202).

135. Method according to any one of claims 127 to 134, wherein in the power supply control step of said at least one power user (101 , 102) a first bias signal is supplied to a gate terminal (G1) of the first field-effect transistor (201) and a second bias signal is supplied to a gate terminal (G2) of the second field-effect transistor (202), so that said first field-effect transistor (201 ), together with said first diode (301), behaves like a substantially ideal diode and so that said second field-effect transistor (202), together with said second diode (302), behaves like a solid-state switch having a closed configuration and an open configuration.

136. Method according to any one of claims 127 to 135, wherein in the power supply control step of said at least one power user (101 , 102), the switching between said closed configuration and said open configuration comprises switching the assembly formed by the second diode (302) and the second field-effect transistor (202) between said closed configuration and said open configuration.

137. Method according to any one of claims 127 to 136, at least a first battery (B1) and a second battery (B2) of a plurality of batteries (B1-B4) being installed on board said tool or vehicle (100), said supply switch circuit (20s’) being positioned in series with said plurality of batteries (B1 -B4), wherein said closed configuration of said supply switch circuit (20s’) allows the passage of an electrical current from the plurality of batteries (B1-B4) to said at least one power user (101 , 102) and said open configuration prevents the passage of said electrical current from the plurality of batteries (B1-B4) to said at least one power user (101 , 102).

138. Method according to any one of claims 127 to 137, wherein said supply switch circuit (20s’) is arranged between said plurality of batteries (B1-B4) and said at least one power user (101 , 102).

139. Method according to any one of claims 127 to 138, further comprising:

- a selection step, a first part (B1 ) of said plurality of batteries (B1 -B4) being selected in said selection step;

- a charging step, said first part (B1 ) of said plurality of batteries (B1 -B4) being selectively charged in said charging step;

- at least one further selection step, a further part (B2, B3, B4) of said plurality of batteries (B1 -B4) being selected in said further selection step; - at least one further charging step, said further part (B2, B3, B4) of said plurality of batteries (B1-B4) being selectively charged in said further charging step, wherein, in the power supply step, said at least one power user (101 , 102) of said tool or vehicle (100) is powered by a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1 ) of said plurality of batteries (B1 -B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1 -B4).

140. Method according to any one of claims 127 to 139, wherein said selection step, said charging step, said at least one further selection step and said at least one power supply step are controlled by a control unit (10), and wherein the control step of the power supply of said at least one power user (101 , 102) is controlled by said control unit (10).

141. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, said control unit (10) being configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), said at least one power user (101 , 102) being configured to be electrically powered,

- at least one battery (B1 ) installed on board said tool or vehicle (100), wherein, in use, said at least one battery (B1) contributes to powering said at least one power user (101 , 102), wherein the control unit (10) comprises a solid-state supply switch circuit (20s’), said supply switch circuit (20s’) being positioned in series to said at least one battery (B1 ) and to said at least one power user (101 , 102), wherein said solid-state supply switch circuit (20s’) forms a unidirectional power switch, said supply switch circuit (20s’) being configured to be operatively switched between a closed configuration, which allows the passage of an electrical current from said at least one battery (B1-B4) to said at least one power user (101 , 102), and an open configuration, which prevents the passage of said electrical current from the at least one battery (B1) to said at least one power user (101 , 102), wherein said control unit (10), in particular in a power supply operating configuration, supervises the power supply of said at least one power user (101 , 102) by means of said supply switch circuit (20s’), controlling at least one switching between said closed configuration of said supply switch circuit (20s’) and said open configuration of said supply switch circuit (20s’).

142. Control unit according to claim 141 , wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower tractor.

143. Control unit according to claim 141 or claim 142, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower robot.

144. Control unit according to any one of claims 141 to 143, wherein said supply switch circuit (20s’) is arranged between said at least one battery (B1 ) and said at least one power user (101 , 102).

145. Control unit according to any one of claims 141 to 144, wherein said supply switch circuit (20s’) is configured to allow the transit of an electrical current in only one direction, in particular when in said closed configuration.

146. Control unit according to any one of claims 141 to 145, wherein said solid-state supply switch circuit (20s’) comprises at least a first field-effect transistor (201), at least a second field-effect transistor (202), a first diode (301 ) and a second diode (302).

147. Control unit according to any one of claims 141 to 146, wherein said at least a first field-effect transistor (201) is at least a first MOSFET (201 ) and wherein said at least a second field-effect transistor (202) is at least a second MOSFET (202).

148. Control unit according to any one of claims 141 to 147, wherein the first diode (301 ) is connected between a drain terminal (D1 ) and a source terminal (S1) of the first field-effect transistor (201) and wherein the second diode (302) is connected between a drain terminal (D2) and a source terminal (S2) of the second field-effect transistor (202).

149. Control unit according to any one of claims 141 to 148, wherein the control unit (10) is configured to control the power supply of said at least one power user (101 , 102), supplying a first bias signal on a gate terminal (G1 ) of the first field-effect transistor (201) and a second bias signal on a gate terminal (G2) of the second field-effect transistor (202) so that said first field-effect transistor (201), together with said first diode (301 ), behaves like a substantially ideal diode and so that said second field-effect transistor (202), together with said second diode (302), behaves like a solid- state switch having a closed configuration and an open configuration.

150. Control unit according to any one or claims 141 to 149, wherein the control unit (10) is configured to control a switching between said closed configuration and said open configuration of said solid-state supply switch circuit (20s’) by controlling a switching of the assembly formed by said second diode (302) and by the second field-effect transistor (202) between said closed configuration and said open configuration.

151. Control unit according to any one of claims 141 to 150, said control unit (10) being configured to be operatively connected with at least a first battery (B1) and a second battery (B2) of a plurality of batteries (B1-B4) installed on board said tool or vehicle (100), said supply switch circuit (20s’) being positioned in series to said plurality of batteries (B1 - B4), wherein said closed configuration of said supply switch circuit (20s’) allows the passage of an electrical current from the plurality of batteries (B1-B4) to said at least one power user (101 , 102) and said open configuration prevents the passage of said electrical current from the plurality of batteries (B1-B4) to said at least one power user (101 , 102).

152. Control unit according to any one of claims 141 to 151 , wherein said supply switch circuit (20s’) is arranged between said plurality of batteries (B1-B4) and said at least one power user (101 , 102).

153. Control unit according to any one of claims 141 to 152, comprising a charging operating configuration, wherein said control unit (10):

- selects a first part (B1) of said plurality of batteries (B1-B4);

- causes a selective charging, by a power supply (30) of said first part (B1 ) of said plurality of batteries (B1 -B4);

- selects a further part (B2, B3, B4) of said plurality of batteries (B1-B4) and

- causes a selective charging, by a power supply (30) of said further part (B2, B3, B4) of said plurality of batteries (B1 - B4); wherein, in the power supply operating configuration, the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1) of said plurality of batteries (B1-B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1 -B4).

154. Control unit according to any one of claims 141 to 153, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from each battery of said plurality of batteries (B1- B4).

155. Control unit according to any one of claims 141 to 154, wherein said control unit (10) is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

156. Control unit according to any one of claims 141 to 155, wherein said control unit (10) is configured to allow the connection or disconnection of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

157. Vehicle for gardening or agriculture (100), said vehicle comprising at least one power user (101 , 102), a plurality of batteries (B1 -B4) electrically connected with said power user (101 , 102), and a control unit (10), said control unit being, in particular, according to any one of claims 141 to 156, wherein the at least one power user (101 , 102) comprises at least one traction motor (102) for the movement of said vehicle and a service motor for the operation of a cutting organ.

158. Method according to claim 157, wherein said vehicle for gardening or agriculture (100) is a lawnmower tractor.

159. Vehicle according to claim 157 or claim 158, wherein said vehicle for gardening or agriculture (100) is a lawnmower robot.

160. Vehicle according to any one of claims 157 to 159, wherein said cutting organ is a mowing plate or disc or bar or wire or blade (101).

161. Control method of a tool or a vehicle (100) for gardening or agriculture, in particular a lawnmower tractor or a lawnmower robot, wherein said tool or vehicle (100) comprises:

- at least one primary power user (102) and one secondary power user (101) and

- a power supply circuit configured to electrically power said primary power user (102) and said secondary power user

(101 ), wherein a plurality of batteries (B1 -B4) are configured to be installed on board said tool or vehicle (100), said batteries (B1-B4), when installed on board said tool or vehicle (100), contributing to electrically power said primary power user

(102) and said secondary power user (101 ) by means of said power supply circuit and wherein the method comprises a step of enabling a power supply and/or an actuation of the primary power user (102), or a power supply and/or an actuation of the primary power user (102) and the secondary power user (101 ).

162. Method according to claim 161 , wherein, in said method, in particular in said step of enabling a power supply and/or an actuation of the primary power user (102), or a power supply and/or an actuation of the primary power user (102) and the secondary power user (101), an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the batteries (B1-B4) connected to said power supply circuit is executed.

163. Method according to claim 161 or claim 162, wherein, in said method, in particular in said step of enabling a power supply and/or an actuation of the primary power user (102), or a power supply and/or an actuation of the primary power user (102) and the secondary power user (101), an electronic control of a number n of batteries (B1-B4) installed on board said tool or vehicle (100) is executed.

164. Method according to any one of claims 161 to 163 wherein, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1-B4), is electronically enabled, and optionally automatically:

- the electrical power supply, by means of said power supply circuit, of only the primary power user (102); or

- the electrical power supply, by means of said power supply circuit, of the primary power user (102) and the secondary power user (101).

165. Method according to any one of claims 161 to 164, wherein said batteries (B1 -B4) are configured to be removably installed on board said tool or vehicle (100).

166. Method according to any one of claims 161 to 165, wherein, if said at least one value among an electrical power, charge, voltage or current is greater than a minimum threshold value, the electrical power supply is electronically enabled, in particular by means of said power supply circuit, of the primary power user (102) and of the secondary power user (101 ) and if said at least one value among an electrical power, charge, voltage or current is less than or equal to a minimum threshold value, the electrical power supply is electronically disabled, in particular by means of said power supply circuit, of the primary power user (102) only and/or the electrical power supply is electronically disabled, in particular by means of said power supply circuit, of said secondary power user (101 ).

167. Method according to any one of claims 161 to 166, wherein, as long as the number n of batteries (B1-B4) is less than a first number I of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102), the power supply and/or actuation of the primary power user (102) and the secondary power user (101) is denied.

168. Method according to any one of claims 161 to 167, wherein, as long as the number n of batteries (B1-B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and less than a second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power actuator (101), said second number k being greater than said first number I, the power supply and/or the actuation of the primary power user (102) is allowed and the power supply and/or actuation of the secondary power user (101 ) is denied.

169. Method according to any one of claims 161 to 168, wherein as long as the number n of batteries (B1-B4) is equal to or greater than said second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power user (101 ), the power supply and/or actuation of the primary power user (102) and the secondary power user (101) is authorised.

170. Method according to any one of claims 161 to 169, wherein the electronic control of the at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit comprises the transmission of a control signal from at least among an electrical power, charge, voltage or current sensor to a control unit (10).

171. Method according to any one of claims 161 to 170, wherein the electronic control of the number n of batteries (B1-B4) installed on board said tool or vehicle (100) comprises the transmission of a battery presence control signal to a control unit (10).

172. Method according to any one of claims 161 to 171 , wherein said control unit (10) is configured to cause, in use, the execution of an electronic enabling step, and optionally automatic:

- of the electrical power supply, by means of said power supply circuit, of only the primary power user (102); or

- of the electrical power supply, by means of said power supply circuit, of the primary power user (102) and the secondary power user (101 ).

173. Method according to any one of claims 161 to 172, wherein the electronic control of the number n of batteries (B1-B4) installed on board said tool or vehicle (100) comprises a step of verifying the presence of a voltage, in particular of a non-zero voltage, at at least one electrical contact susceptible in use to contact with at least one of said batteries (B1-B4) when installed on board the tool or vehicle (100).

174. Method according to any one of claims 161 to 173, wherein said voltage is the voltage of at least one battery of said plurality of batteries (B1 -B4).

175. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, configured to be operatively connected with:

- at least one primary power user (102) and one secondary power user (101) and - a plurality of batteries (B1-B4) configured to be installed on board said tool or vehicle (100) and to be intended to electrically power said primary power user (102) and said secondary power user (101) by means of a power supply circuit, wherein the control unit (10) is configured for:

- executing an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the batteries (B1-B4) connected to said power supply circuit and/or an electronic control of a number n of batteries (B1 -B4) installed on board said tool or vehicle (100),

- electronically enabling, and optionally automatically, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1-B4):

- the electrical power supply, by means of said power supply circuit, of only the primary power user (102); or

- the electrical power supply, by means of said power supply circuit, of the primary power user (102) and the secondary power user (101).

176. Control unit according to claim 175, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower tractor.

177. Control unit according to claim 175 or claim 176, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower robot.

178. Control unit according to any one of claims 175 to 177, wherein said batteries (B1-B4) are configured to be removably installed on board said tool or vehicle (100).

179. Control unit according to any one of claims 175 to 178, wherein said control unit (10) is configured to electronically compare said at least one value among an electrical power, charge, voltage or current with a minimum threshold value.

180. Control unit according to any one of claims 175 to 179, wherein, if said at least one value among an electrical power, charge, voltage or current is greater than said minimum threshold value, said control unit (10) is configured for electronically enabling the electrical power supply, in particular by means of said supply circuit, of the primary power user (102) and the secondary power user (101).

181. Control unit according to any one of claims 175 to 180, wherein, if said at least one value among an electrical power, charge, voltage or current is less than or equal to a minimum threshold value, said control unit (10) is configured for electronically enabling the electrical power supply, in particular by means of said supply circuit, of the primary power user (102) only and/or electronically disabling the electrical power supply, in particular by means of said power supply circuit, of said secondary power user (101 ).

182. Control unit according to any one of claims 175 to 181 , wherein the configuration of the control unit (10) is such that, as long as the number n of batteries (B1 -B4) is less than a first number i of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102), the power supply and/or actuation of the primary power user (102) and the secondary power user (101 ) is denied.

183. Control unit according to any one of claims 175 to 182, wherein the configuration of the control unit (10) is such that, as long as the number n of batteries (B1-B4) is equal to or greater than said first number i of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and less than a second number k of batteries sufficient to allow enabling the power supply and/or actuation of the primary power user (102) and the secondary power actuator (101 ), said second number k being greater than said first number i, the power supply and/or the actuation of the primary power user (102) is allowed and the power supply and/or actuation of the secondary power user (101 ) is denied.

184. Control unit according to any one of claims 175 to 183, wherein the configuration of the control unit (10) is such that, as long as the number n of batteries (B1-B4) is equal to or greater than said second number k of batteries sufficient to allow enabling the power supply and/or the actuation of the primary power user (102) and the secondary power user (101 ), the power supply and/or the actuation of the primary power user (102) and the secondary power user (101 ) is authorised.

185. Control unit according to any one of claims 175 to 184, wherein said control unit (10) is configured to be connected to at least one among an electrical power, charge, voltage or current sensor and to receive, from said sensor, a control signal of the at least one value among an electrical power, charge, voltage or current, made available by the batteries (B1 -B4) connected to said power supply circuit.

186. Control unit according to any one of claims 175 to 185, wherein said control unit (10) is configured to be connected with at least one among an electrical power, charge, voltage or current sensor and to receive a battery presence control signal, indicative of the number n of batteries (B1-B4) installed on board said tool or vehicle (100).

187. Control unit according to any one of claims 175 to 186, wherein the control unit (10) is configured to electronically, and optionally automatically, enable in accordance with said control signal:

- the electrical power supply, by means of said power supply circuit, of only the primary power user (102); or

- the electrical power supply, by means of said power supply circuit, of the primary power user (102) and the secondary power user (101).

188. Control unit according to any one of claims 175 to 187, configured to be operatively connected with at least one electrical contact susceptible in use to come into contact with at least one of said batteries (B1-B4) when installed on board the tool or vehicle (100), wherein the battery presence control signal is a voltage signal, in particular of a non-zero voltage, taken from said electrical contact.

189. Control unit according to any one of claims 175 to 188, wherein said voltage signal is indicative of the voltage of at least one battery of said plurality of batteries (B1-B4).

190. Vehicle for gardening or agriculture (100), comprising:

- at least one primary power user (102) and one secondary power user (101),

- a plurality of batteries (B1-B4) electrically connected to said primary power user (102) and to said secondary power user (101), and

- a control unit (10), said control unit being in particular according to any one of claims 175 to 189, wherein the at least one power user (101 , 102) comprises at least one traction motor (102) for the movement of said vehicle and a service motor for the operation of a cutting organ.

191. Method according to claim 190, wherein said vehicle for gardening or agriculture (100) is a lawnmower tractor.

192. Vehicle according to claim 190 or claim 191 , wherein said vehicle for gardening or agriculture (100) is a lawnmower robot.

193. Vehicle according to any one of claims 190 to 192, wherein said cutting organ is a mowing plate or disc or bar or wire or blade (101).

194. Vehicle according to any one of claims 190 to 193, comprising at least one control panel comprising at least a first user interface device and a second user interface device.

195. Vehicle according to any one of claims 190 to 194, wherein said first user interface device is a first selector or a first display and wherein said second user interface device is a second selector or a second display.

196. Vehicle according to any one of claims 190 to 195, wherein said traction motor (102) acts as a primary power user and said service motor acts as a secondary power user.

197. Vehicle according to any one of claims 190 to 196, wherein said control panel acts as a primary power user and said service motor acts as a secondary power user.

198. Vehicle according to any one of claims 190 to 197, wherein said traction motor (102) acts as primary power user and said second user interface device acts as secondary power user.

199. Vehicle according to any one of claims 190 to 198, wherein said first user interface device acts as a primary power user and said traction motor (102) acts as a secondary power user.

200. Vehicle according to any one of claims 190 to 199, wherein said first user interface device acts as a primary power user and said second user interface device acts as a secondary power user.

201 . Vehicle according to any one of claims 190 to 200, wherein said vehicle further comprises:

- at least one pair of traction wheels, or tracks, (105) operatively connected with said at least one traction motor (102),

- a driving seat (103),

- at least one compartment (V1 -V3) configured and specifically intended to house said plurality of batteries (B1 -B4).

202. Vehicle according to any one of claims 190 to 201 , wherein said at least one compartment (V1 -V3) is arranged in a substantially central position of said vehicle for gardening or agriculture (100).

203. Vehicle according to any one of claims 190 to 202, wherein said at least one compartment (V1 -V3) is arranged in a substantially barycentric position of said vehicle for gardening or agriculture (100).

204. Vehicle according to any one of claims 190 to 203, wherein said at least one compartment (V1 -V3) is arranged substantially below said driving seat (103).

205. Vehicle according to any one of claims 190 to 204, wherein said at least one compartment (V1 -V3) comprises at least one door, provided to protect said at least one compartment (V1 -V3) and at least one slide configured to allow the introduction of at least part of said plurality of batteries (B1-B4) inside said at least one compartment (V1-V3) and/or to allow the extraction of at least part of said plurality of batteries (B1-B4) from said at least one compartment (V1 -V3).

206. Vehicle according to any one of claims 190 to 205, wherein said at least one compartment (V1 -V3) comprises at least one fan, controllable at least in activation or deactivation, intended to cause a cooling of at least part of said plurality of batteries.

207. Vehicle according to any one of claims 190 to 206, wherein at least one battery of said plurality of batteries (B1 -B4) comprises at least one fan, controllable at least in activation or deactivation, intended to cause a cooling thereof.

208. Management method of a tool or vehicle (100), wherein said tool or vehicle (100) comprises at least one power user (101 , 102) and a power supply circuit configured to electrically power said at least one power user (101 , 102), wherein at least one among a first battery (B1) and/or a second battery (B2) of a plurality of batteries (B1-B4) is configured to be installed removably on board said tool or vehicle (100), said at least one among said first battery (B1) and said second battery (B2), when installed on board said tool or vehicle (100), contributing to electrically power said at least one power user (101 , 102) by means of said power supply circuit, wherein the method comprises a step of configuring a control unit (10) in use controlling at least one among an activation of an electrical power supply, a deactivation of the electrical power supply and an adjustment of the electrical power supplied, by at least part of the plurality of batteries (B1-B4), in particular by at least one among the first battery (B1) and/or the second battery (B2), to said at least one power user (101 , 102), wherein, in said configuration step, the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), from the power supply circuit, without interruption of the electrical power supplied to said at least one power user (101 , 102).

209. Method according to claim 208, wherein said tool or vehicle (100) is a tool or vehicle for gardening or agriculture.

210. Method according to claim 208 or claim 209, wherein said tool or vehicle (100) is lawnmower tractor.

211. Method according to any one of claims 208 to 210, wherein, in said configuration step, the control unit (10) allows the connection or disconnection of one among the first battery (B1 ) and the second battery (B2), from the power supply circuit, without interruption of the electrical power supply provided to said at least one power user (101 , 102).

212. Method according to any one of claims 208 to 211 , wherein said tool or vehicle (100) further comprises at least one compartment (V1 , V2) for housing said plurality of batteries (B1-B4), in particular said first battery (B1) and/or said second battery (B2).

213. Method according to any one of claims 208 to 212, wherein said method further comprises a step of introducing said at least one battery of the plurality of batteries (B1-B4) into said at least one compartment (V1 , V2), so as to operate a connection of said at least one battery of the plurality of batteries (B1-B4) to said tool or vehicle (100).

214. Method according to any one of claims 208 to 213, wherein said method further comprises a step of extracting said at least one battery of the plurality of batteries (B1-B4) into said at least one compartment (V1 , V2), so as to operate a disconnection of said at least one battery of the plurality of batteries (B1-B4) from said tool or vehicle (100).

215. Method according to any one of claims 208 to 214, wherein, following the disconnection of said at least one battery of the plurality of batteries (B1 -B4) from said tool or vehicle (100), a step of connecting said at least one battery of the plurality of batteries (B1-B4) to a power supply and/or electrical energy storage device or to a further tool or vehicle for gardening or agriculture is executed.

216. Method according to any one of claims 208 to 215, wherein prior to the connection of said at least one battery of the plurality of batteries (B1-B4) to said tool or vehicle (100) a step of disconnecting said at least one battery of the plurality of batteries (B1 -B4) from a power supply and/or electrical energy storage device or from a further tool or vehicle for gardening or agriculture is executed.

217. Method according to any one of claims 208 to 216, wherein, following the connection or disconnection of said at least one battery of the plurality of batteries (B1-B4), in particular a connection or disconnection of one among said first battery (B1) and said second battery (B2), a step of filtering and/or limiting voltage and/or current peaks and/or drops is included upstream of said at least one power user (101 , 102), in particular upstream of said power supply circuit of the power user (101 , 102).

218. Method according to any one of claims 208 to 217, wherein the at least one power user (101 , 102) comprises a primary power user (102) and a secondary power user (101), and wherein, in said configuration step, the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1 -B4), in particular of one among the first battery (B1 ) and the second battery (B2), from the power supply circuit, without interruption of the electrical power supply provided to said primary power user (102) and determining a powering down or an electrical power supply of said secondary power user (101 ) in accordance with at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit.

219. Method according to any one of claims 208 to 218, wherein the method comprises a step of enabling an actuation of the at least one primary power user (102) among the plurality of power users (101 , 102), or of an actuation of the primary power user (102) and the secondary power user (101) among the plurality of power users (101 , 102), as a function of a number n of batteries (B1-B4).

220. Method according to any one of claims 208 to 219, wherein, following the disconnection of said at least one battery from the plurality of batteries (B1-B4), in particular the disconnection of one among said first battery (B1 ) and said second battery (B2), the control unit (10) automatically performs an electronic verification step of whether at least one among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit is sufficient to power the at least one power user (101 , 102), preferably said primary power user (102) and said secondary power user (101 ).

221 . Method according to any one of claims 208 to 220, wherein, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said power supply circuit, the control unit (10) executes an electronic limitation of a power which can be provided to said at least one power user (101 , 102) and/or of a power absorbable by said at least one power user (101 , 102), preferably an electronic limitation of a power which can be provided to said primary power user (102) and/or to said secondary power user (101 ) and/or of a power absorbable by said primary power user (102) and/or said secondary power user (101).

222. Method according to any one of claims 208 to 221 , wherein, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said supply circuit, the control unit (10) executes a powering down of said secondary power user (101 ) keeping said primary power user (102) in a power supply condition.

223. Method according to any one of claims 208 to 222, wherein, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said supply circuit, the control unit (10) executes a powering down of said primary power user (102) and of said secondary power user (101).

224. Method according to any one of claims 208 to 223, wherein the control unit (10), in particular in said powering down of said primary power user (102) and said secondary power user (101 ), allows an electrical power supply at least of itself and of electrical control circuits of said primary power user (102) and/or of said secondary power user (101).

225. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), the at least one power user (101 , 102) being configured to be electrically powered,

- a plurality of batteries (B1-B4), configured to be removably installed on board said tool or vehicle (100) and to be intended to electrically power said at least one power user (101 , 102) by means of a power supply circuit, wherein the control unit (10) is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1 -B4), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

226. Control unit according to claim 225, wherein the control unit (10) is configured to allow the connection or disconnection of at least one among a first battery (B1) and a second battery (B2) of said plurality of batteries (B1 -B4) from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

227. Control unit according to claim 225 or claim 226, wherein said tool or vehicle (100) for gardening or agriculture is a lawnmower tractor.

228. Control unit according to any one of claims 225 to 227, comprising a step of filtering and/or limiting voltage and/or current peaks and/or drops, executing, in use, a filtering and/or a limiting of voltage and/or current peaks and/or drops, upstream of said at least one power user (101 , 102).

229. Control unit according to any one of claims 225 to 228, wherein said filtering and/or said limiting of voltage and/or current peaks and/or drops are executed upstream of said power supply circuit of said power user (101 , 102).

230. Control unit according to any one or claims 225 to 229, wherein the control unit (10) is intended to cause a selection and/or a limitation, in particular an electronic selection and/or limitation, of a maximum electrical power deliverable by each battery said plurality of batteries (B1 -B4).

231 . Control unit according to any one of claims 225 to 230, wherein said control unit (10) is configured to transmit a power management signal to a switch of at least one battery selected among the batteries of said plurality of batteries (B1-B4).

232. Control unit according to any one of claims 225 to 231 , wherein said control unit (10) is configured to selectively and/or independently transmit said power management signal to said switch for each battery of the plurality of batteries (B1-B4).

233. Control unit according to any one of claims 225 to 232, wherein said switch is a bidirectional power switch.

234. Control unit according to any one of claims 225 to 233, the at least one power user (101 , 102) comprising a primary power user (102) and a secondary power user (101), wherein said control unit (10) is configured to enable an actuation of the primary power user (102) or an actuation of the primary power user (102) and the secondary power user (101), as a function of the number n of batteries (B1-B4).

235. Control unit according to any one of claims 225 to 234, wherein the control unit (10) is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one primary power user (102) and determining a powering down or an electrical power supply of said secondary power user (101) in accordance with at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit.

236. Control unit according to any one of claims 225 to 235, wherein, in use, following the disconnection of said at least one battery from the plurality of batteries (B1-B4), in particular the disconnection of one among said first battery (B1) and said second battery (B2), the control unit (10) is configured to perform an automated electronic verification of whether at least one among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit is sufficient to power the at least one power user (101 , 102), preferably said primary power user (102) and said secondary power user (101 ).

237. Control unit according to any one of claims 225 to 236, wherein said control unit (10) is configured to perform, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said power supply circuit, an electronic limitation of a power which can be provided to said at least one power user (101 , 102) and/or of a power absorbable by said at least one power user (101 , 102), preferably an electronic limitation of a power which can be provided to said primary power user (102) and/or to said secondary power user (101 ) and/or of a power absorbable by said primary power user (102) and/or said secondary power user (101 ).

238. Control unit according to any one of claims 225 to 237, wherein said control unit (10) is configured to perform, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said supply circuit, a powering down of said secondary power user (101) keeping said primary power user (102) in a power supply condition.

239. Control unit according to any one of claims 225 to 238, wherein said control unit (10) is configured to perform, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said supply circuit, a powering down of said primary power user (102) and of said secondary power user (101).

240. Control unit according to any one of claims 225 to 239, wherein the control unit (10), in particular in said powering down of said primary power user (102) and said secondary power user (101), allows an electrical power supply at least of itself and of electrical control circuits of said primary power user (102) and/or of said secondary power user (101).

241 . Lawnmower tractor comprising:

- at least one power user (101 , 102) configured to be electrically powered,

- a power supply circuit for said at least one power user (101 , 102),

- a driving seat (103),

- at least one compartment (V1 , V2) for housing a plurality of batteries (B1-B4), in particular for housing at least a first battery (B1) and a second battery (B2), said plurality of batteries (B1 -B4) being configured to power said at least one power user (101 , 102) by means of said power supply circuit,

- a control unit (10), said control unit being in particular according to any one of claims 225 to 238.

242. Lawnmower tractor according to claim 241 , wherein said control unit (10) is configured to allow the connection or disconnection of the first battery (B1 ) or of the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102), following an introduction or an extraction of the first battery (B1) or of the second battery (B2) from a respective compartment (V1 , V2) positioned on said tool or vehicle (100).

243. Lawnmower tractor according to claim 241 or claim 242, wherein said at least one compartment (V1 , V2) is associated with guide means suitable for defining defined trajectories for introducing and/or extracting the batteries (B1- B4) into said at least one compartment (V1 , V2).

244. Lawnmower tractor according to any one of claims 241 to 243, wherein said at least one compartment (V1 , V2) is associated with ventilation means suitable for determining a cooling of the batteries (B1-B4) housed in said at least one compartment (V1 , V2).

245. Lawnmower tractor according to any one of claims 241 to 244, wherein said at least one compartment (V1 , V2) for housing a plurality of batteries (B1 -B4), comprises a first compartment (V1 ) and a second compartment (V2), said first compartment (V1) and second compartment (V2) being substantially equally extended and being positioned symmetrically with respect to a plane of symmetry of the lawnmower.

246. Lawnmower tractor according to any one of claims 241 to 245, wherein at least part of the extension of said first compartment (V1) and at least part of the extension of said second compartment (V2) are positioned in respective portions of said lawnmower tractor arranged next to the portion of said lawnmower tractor at which said driving seat (103) is positioned.

247. Lawnmower tractor according to any one of claims 241 to 246, said first compartment (V1 ) extending from a first access section extending along a substantially vertical plane at a first side of said lawnmower tractor and said second compartment (V2) extending from a second access section extending along a substantially vertical plane at a second side of said lawnmower tractor opposite said first side, wherein said lawnmower tractor further comprises a first door (S1) and a second door (S2) applied to said first access section and to said second access section, respectively, so as to allow to operate a selective closure of said first compartment (V1) and said second compartment (V2), respectively.

248. Lawnmower tractor according to any one of claims 241 to 247, further comprising a containment casing (28) of said control unit (10) and/or of a power supply circuit or of specific electronic components belonging to said control unit (10) and/or to said power supply.

249. Lawnmower tractor according to any one of claims 241 to 248, wherein said casing (28) comprises a first halfshell (28P) in thermally conductive material, for example aluminium, and a second half-shell (28S) in thermally insulating material.

250. Lawnmower tractor according to any one of claims 241 to 249, wherein said first half-shell (28P) is made of aluminium.

251 . Lawnmower tractor according to any one of claims 241 to 250, wherein said second half-shell (28S) is made of moulded plastic.

252. Lawnmower tractor according to any one of claims 241 to 251 , wherein a plurality of cooling fins (8) is obtained in a single piece with said first half-shell (28P).

253. Lawnmower tractor according to any one of claims 241 to 252, wherein said lawnmower tractor further comprises at least one additional compartment for housing said casing (28).

254. Lawnmower tractor according to any one of claims from 241 to 253, wherein said additional compartment is distinct and/or separate from said at least one compartment (V1 , V2) for housing a plurality of batteries (B1-B4a).

255. Lawnmower tractor according to any one of claims 241 to 254, wherein said additional compartment is distinct and/or separated in particular with respect to said first compartment (V1) and second compartment (V2),

256. Lawnmower tractor according to any one of claims 241 to 255, wherein said additional compartment is arranged below said driving seat (103).

257. Management method for charging and discharging a plurality of batteries (B1 -B4) housed in a tool or vehicle (100), in particular a tool or vehicle for gardening or agriculture, more in particular in a lawnmower tractor, the method comprising:

- a selection step, a first part (B1 ) of said plurality of batteries (B1 -B4) being selected in said selection step;

- a charging step, said first part (B1 ) of said plurality of batteries (B1 -B4) being selectively charged in said charging step;

- at least one further selection step, a further part (B2, B3, B4) of said plurality of batteries (B1 -B4) being selected in said further selection step;

- at least one further charging step, said further part (B2, B3, B4) of said plurality of batteries (B1-B4) being selectively charged in said further charging step;

- a power supply step, at least one power user (101 , 102) of said tool or vehicle (100) being supplied in said supply step by means of a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1 ) of said plurality of batteries (B1-B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1-B4).

258. Method according to any one of the preceding claims, wherein said at least one power user (101 , 102) of said tool or vehicle (100) is supplied in said power supply step by a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from each battery of said plurality of batteries (B1-B4).

259. Method according to any one of the preceding claims, wherein the selection step of said first part (B1) or said further part (B2, B3, B4) of the plurality of batteries (B1 -B4) comprises the transmission, from a control unit (10) and by means of at least one charge enabling control line (14) operatively connected with a control input of said plurality of batteries (B1-B4), of a control signal intended to select said first part (B1) of said plurality of batteries (B1 -B4) or said further part (B2, B3, B4) of said plurality of batteries (B1-B4) to cause a switching of a supply controller or switch (44) of the first part (B1) or of the further part (B2, B3, B4) of said plurality of batteries (B1-B4) so that a flow of electrical energy from a power supply (30) can determine the charging thereof.

260. Method according to any of the preceding claims, wherein the selection step includes the transmission, on said at least one control line (14) of a numerical signal, in particular binary.

261. Method according to claim 260, wherein the "0s" and "1s" are transmitted with pulses of different time extension.

262. Method according to any one of the preceding claims, wherein the pulses are negative voltage pulses, wherein at the "0s" or "1s", a voltage normally assuming a first and higher value is temporarily brought, for the time extension of "0s" and "1 s", to a second and lower value.

263. Method according to any one of the preceding claims, wherein the control line (14) is of the 1-wire type.

264. Method according to any one of the preceding claims, wherein the selection step of said first part (B1) or said further part (B2, B3, B4) of the plurality of batteries (B1-B4) comprises the transmission, from the control unit (10) and through a control line of a plurality of charge enabling control lines (14) each operatively connected with a control input of a respective battery of said plurality of batteries (B1 -B4), of a control signal intended to select a specific battery of said plurality of batteries (B1-B4) to cause a switching of a supply controller or switch (44) of said specific battery, so that a flow of electrical energy from a power supply (30) can determine the charging thereof.

265. Method according to any one of the preceding claims, comprising:

- at least one further selection step, wherein the control unit (10) selects a subsequent part (B2, B3, B4) of said plurality of batteries (B1 -B4), and

- a charging step, wherein the power supply (30) selectively charges said subsequent part (B2, B3, B4) of said previously selected plurality of batteries (B1-B4).

266. Method according to any one of the preceding claims, wherein the first part (B1) of said plurality of batteries (B1-B4) comprises a single first battery.

267. Method according to any one of the preceding claims, wherein the subsequent part of said plurality of batteries (B1-B4) comprises at least a single second battery which is different with respect to said first battery.

268. Method according to any one of the preceding claims, wherein the selection step of the subsequent part (B2, B3, B4) of the plurality of batteries (B1 -B4) is alternative to the selection step of the first part (B1 ) of the plurality of batteries (B1-B4) and determines an isolation of said subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4) from the first part (B1 ) of said plurality of batteries (B1-B4).

269. Method according to any one of the preceding claims, wherein the selection step of said first part (B1) or said subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4) comprises the transmission, from the control unit (10) and by means of at least one charge enabling control line (14) operatively connected with a control input of said plurality of batteries (B1-B4), of a control signal intended to select said first part (B1) of said plurality of batteries (B1 -B4) or said subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4) to cause a switching of a supply controller or switch (44) of the first part (B1 ) or of the subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4) so that a flow of electrical energy from said power supply (30) can determine the charging thereof.

270. Method according to any one of the preceding claims, comprising a step of detecting the charge of said first part (B1) of said plurality of batteries (B1-B4) by means of at least one charge sensor, in particular a voltage sensor.

271. Method according to any one of the preceding claims, wherein comprising an interruption of the charging of the first part (B1 ) of said plurality of batteries (B1-B4) when said charging sensor detects a higher charge, in particular a voltage and/or a current, with respect to a predetermined threshold value.

272. Method according to any one of the preceding claims, wherein the selection step, the charging step, the supply step of the at least one power user (101 , 102) of said tool or vehicle (100), and optionally at least one of the further selection step, the charge detection step, or the interruption of the charge are managed through a control unit (10).

273. Method according to any one of the preceding claims, wherein the power supply (30) is configured to be removably connectable to said plurality of batteries (B1 -B4) through said control unit (10), in particular through a connector (16).

274. Method according to any one of the preceding claims, wherein said charge sensor comprises, or is, a voltage sensor or a current sensor.

275. Method according to any one of the preceding claims, wherein the interruption of the charge automatically determines the selection step of the subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4) and a de-selection step of said first part (B1 ) of said plurality of batteries (B1 -B4).

276. Method according to any one of the preceding claims, wherein the selection step comprises an electronic selection of said at least a first part (B1) of said plurality of batteries (B1-B4) and, optionally of the at least one subsequent part (B2, B3, B4) of said plurality of batteries (B1 -B4).

277. Method according to any one of the preceding claims, wherein said selection comprises a transmission of a selection command on at least one control line (14) connected to at least one among said first part (B1 ) and said subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4); said control line (14) terminating on a control input (15) of at least one among said first part (B1) and said subsequent part (B2, B3, B4) of the plurality of batteries (B1- B4).

278. Method according to claim 277, wherein said selection comprises transmitting a selection command on a control line (14) uniquely associated with a battery of the plurality of batteries (B1 -B4) which is intended to be charged.

279. Method according to any one of the preceding claims, comprising electronic malfunction detection step and/or a verification step of an improperoperating condition, optionally performed automatically, on each battery of the plurality of batteries (B1-B4).

280. Method according to any one of the preceding claims, comprising an exclusion step of at least one battery selected from the batteries of the plurality of batteries (B1 -B4) when for said at least one battery of the plurality of batteries said malfunction and/or said improper operating condition is detected, the exclusion step determining the exclusion of the battery selected from the power supply step.

281. Method according to any one of the preceding claims, wherein said malfunction comprises at least one of a lower operating voltage with respect to a first lower threshold or higher with respect to a second upper threshold, a lower operating temperature with respect to a first lower threshold or higher with respect to a second upper threshold.

282. Method according to any one of the preceding claims, wherein the plurality of batteries (B1 -B4) is configured to be removed or inserted “hot,” and/or the method comprises enabling a removal or insertion of at least one battery of said plurality of batteries (B1-B4) “hot” and/or during at least the supply and/or charging, without causing a power supply interruption of the at least one power user (101 , 102) and/or without causing a charging interruption of the remaining batteries of the plurality of batteries (B1 -B4).

283. Method according to any one of the preceding claims, comprising a step of detecting a temperature (t) of at least one part of the plurality of batteries (B1 -B4) by means of at least one temperature sensor, in particular by means of at least one temperature sensor operatively associated with the plurality of batteries (B1-B4), and preferably by means of a plurality of temperature sensors each operatively associated with a respective battery (B1 -B4).

284. Method according to any one of the preceding claims, comprising:

- an electronic comparison step of a signal indicative of the temperature (t) assumed by at least one battery of said plurality of batteries (B1-B4) with a temperature threshold value (tin), and

- an activation step of at least one fan for cooling least one battery of said plurality of batteries (B1 -B4) when the signal indicates a temperature (t) higher than said temperature threshold (t™).

285. Method according to claim 284, comprising:

- an electronic comparison step of a plurality of signals indicative of the temperature (t) assumed by each battery of said plurality of batteries (B1 -B4) with a temperature threshold value (tin), and

- an activation step of at least one fan for cooling each of the batteries of the plurality of batteries (B1 -B4) whose relative signal indicates a temperature (t) higher than said temperature threshold (tin).

286. Method according to any one of the preceding claims, comprising a control of a number n of batteries (B1-B4) operatively connected to the control unit (10), and comprises enabling an actuation of at least one priority power user (102) among the plurality of power users (101 , 102), or of a priority power user (102) and a secondary power user (101) among the plurality of power users (101 , 102), as a function of the number n of batteries (B1-B4).

287. Management method for charging and discharging a plurality of batteries (B1 -B4) housed in a tool or vehicle (100), in particular a tool or vehicle for gardening or agriculture, the method comprising:

- a selection step, wherein a control unit (10) operatively interposed between the plurality of batteries (B1-B4) and a plurality of power users (101 , 102) of the tool or vehicle (100) selects at least a first part (B1) of said plurality of batteries (B1-B4), enabling a charge thereof;

- a power supply step of the at least one power user (101 , 102) of said tool or vehicle (100), said supply step comprising a transfer of electrical energy simultaneously occurring from at least part of the plurality of batteries (B1-B4) to said at least one power user (101 , 102); the method comprising a control of a number n of batteries (B1-B4) operatively connected to the control unit (10), and comprising enabling an actuation of at least one priority power user (102) among the plurality of power users (101 , 102), or of a priority power user (102) and a secondary power user (101) among the plurality of power users (101 , 102), as a function of the number n of batteries (B1-B4).

288. Method according to any one of the preceding claims, wherein the priority power user (102) comprises at least one motor, in particular an electric motor, preferably configured and specifically intended to cause a movement of said tool or vehicle (100) and/or an electronic control unit intended to control, in particular to determine at least one of a power supply, a powering down, and a power delivery, of the at least one motor.

289. Method according to any one of the preceding claims, wherein the secondary power user (101) comprises at least one motor or servo-actuator installed on said tool or vehicle (100), configured and specifically intended to determine the execution of an operating activity of the tool or vehicle (100).

290. Method according to any one of the preceding claims, comprising a charging step, wherein a power supply (30) selectively charges the first part (B1 ) of said previously selected plurality of batteries (B1 -B4).

291 . Method according to any of the preceding claims, wherein the enabling of the actuation is such that:

- as long as the number n of batteries (B1 -B4) is less than a first number I of batteries sufficient to allow enabling the actuation of the priority power user (102), the actuation of the priority power user (102) and the secondary power user (101) is denied;

- as long as the number n of batteries (B1-B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and less than a second number k, greater than I, of batteries sufficient to allow enabling the actuation of the priority power user (102) and the secondary power user (101 ), the actuation of the priority power user (102) is authorized and the actuation of the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and is greater than the number k of batteries sufficient to allow enabling the actuation of the secondary power user (101 ), the actuation of the priority power user (102) and the secondary power user (101) is authorized.

292. Method according to any one of the preceding claims, comprising an electronic survey step of a voltage value of said at least one part (B1 ) of the plurality of batteries (B1 -B4), in particular during the charging step of the batteries, the method comprising an interruption of charging the at least a first part (B1 ) of the plurality of batteries (B1-B4) when a voltage value of said at least a first part (B1 ) of the plurality of batteries (B1-B4) reaches a maximum voltage threshold value (Vmax) and/or comprising an electronic disabling of said at least a first part (B1) of the plurality of batteries (B1- B4), such that said at least a first part (B1 ) of the plurality of batteries (B1-B4) is excluded from the power supply of the at least one power user (101 , 102) when the voltage of the at least a first part (B1 ) of the plurality of batteries (B1-B4) is below a minimum threshold value (Vmin).

293. Method according to any one of the preceding claims, comprising a step of electronically detecting a value of a charging current supplied to said at least one part (B1 ) of the plurality of batteries (B1 -B4) during the charging step of the batteries; the method comprising an interruption of charging said at least a first part (B1 ) of the plurality of batteries (B1-B4) when the current value exceeds a given maximum safety value (I max) and/or falls below a minimum charging current value (Imin).

294. Method according to any one of the preceding claims, wherein said maximum safety value (Imax) is greater than said minimum charging current value (Imin).

295. Method according to any one of the preceding claims, comprising:

- an immediate interruption of the charging step when the charging current value is above said maximum safety value (Imax); or

- an interruption of the charging step when the charging current value remains below said minimum charging current value (Imin) for a time equal to or greater than a determined waiting time (Tw).

296. Method according to any one of the preceding claims, wherein the step of verifying an improper operating condition comprises a step of verifying a voltage imbalance ( V(B_n, B_n+i)) and/or a charge level imbalance (ASoC(F„, B_n+iy) between at least a first battery (Bn) and a second battery (Bn+i) of said plurality of batteries (B1- B4), the step of verifying said voltage imbalance ( V(B_n, B_n+i)) and/or said charge level imbalance ( SoC(B_n, B_n+i)) comprising:

- a comparison, in particular an electronic comparison, between a charge level difference (ASoC(F„, /?„+,)) between said at least a first battery (Bn) and a second battery (Bn+i) and a first reference value (Vv1 ), and/or

- a comparison, in particular an electronic comparison, between a voltage imbalance (At/ (B_n, B_n+i))' between said at least a first battery (Bn) and a second battery (Bn+i) and a second reference value (Vv2).

297. Method according to any one of the preceding claims, wherein if it is found that the charge level imbalance ( SoC(B_n, B_n+i)) between said at least a first battery (Bn) and a second battery (Bn+i) is greater than said first reference value (Vv1 ), the method comprises disabling said at least one power user (101 , 102).

298. Method according to any one of the preceding claims, comprising a step of selecting and/or limiting a maximum electrical power deliverable by each battery of the plurality of batteries (B1-B4), said selecting and/or limiting being an electronic selection and/or limitation.

299. Method according to any one of the preceding claims, wherein the step of selecting and/or limiting the maximum power comprises a transmission, in particular performed selectively and/or independently for each battery of the plurality of batteries (B1-B4), of a power management signal to a switch, in particular a bidirectional power switch, of at least one battery selected among the batteries of said plurality of batteries.

300. Method according to claim 299, wherein said transmission of said power management signal to said switch is performed selectively and/or independently for each battery of the plurality of batteries (B1-B4).

301. Method according to any one of the preceding claims, wherein in the charging step the control unit (10) is configured to charge at least afirst part of the plurality of batteries (B1-B4) with a predefined charging current, optionally constant, until a predetermined threshold voltage value is reached; the control unit (10) being configured to execute a step of completing a charging of said at least a first part of the plurality of batteries (B1-B4), occurring when the voltage of said at least a first part of the plurality of batteries (B1-B4) exceeds said predetermined threshold voltage value, wherein a charging current of said at least a first part of the plurality of batteries (B1 -B4) is progressively reduced, optionally to a substantially zero value.

302. Management method for charging and discharging a plurality of batteries (B1 -B4) housed in a tool or vehicle (100), in particular a tool or vehicle for gardening or agriculture; the method comprising:

- a power supply step of the at least one power user (101 , 102) of said tool or vehicle (100), said supply step comprising a transfer of electrical energy simultaneously occurring from at least part of said plurality of batteries (B1-B4) to said at least one power user (101 , 102),

- a step of selecting and/or limiting a maximum electrical power deliverable by each battery of the plurality of batteries (B1-B4), said selecting and/or limiting being an electronic selection and/or limitation, respectively.

303. Method according to any one of the preceding claims, comprising:

- a selection step, wherein a control unit (10) operatively interposed between the plurality of batteries (B1-B4) and at least one power user (101 , 102) of the tool or vehicle (100) selects a first part (B1 ) of said plurality of batteries (B1-B4), enabling a charge thereof;

- a charging step, wherein a power supply (30) selectively charges said first part (B1) of said previously selected plurality of batteries (B1-B4).

304. Method according to any one of the preceding claims, comprising a connection step of the plurality of batteries (B1-B4), optionally by means of the control unit (10), with a management system (20) forming part of said tool or vehicle (100), the connection step being a removable connection step occurring by means of a connector (16).

305. Method according to any one of the preceding claims, wherein said management system (20) is operatively interposed between said control unit (10) and said at least one power user (101 , 102).

306. Method according to any one of the preceding claims, wherein the management system (20) comprises, or is connected to, a power supply circuit of said tool or vehicle (100).

307. Method according to any one of the preceding claims, wherein the method includes interrupting or allowing said power supply step by means of at least one power switch (20’, 20s), controllable by means of a control signal determining, in use, a switching between a closed configuration and an open configuration of said power switch; said at least one internal power switch (20’, 20s) being configured and intended to determine the power supply or interruption of said at least one power user (101 , 102).

308. Method according to any one of the preceding claims, wherein the method includes interrupting or allowing said power supply step by means of a power switch (20s) of a control system (20) of the tool or vehicle (100), operatively interposed between said plurality of batteries (B1-B4) and said at least one power user (101 , 102).

309. Method according to any one of the preceding claims, wherein the method includes interrupting or allowing said power supply step by means of a power switch (20’) inside said control unit (10), the power switch (20’) being operatively interposed between said plurality of batteries (B1-B4) and said at least one power user (101 , 102), the power switch (20’) being controllable by means of a control signal determining, in use, a switching between a closed configuration and an open configuration adapted to determine an interruption or a supply of said at least one power user (101 , 102).

310. Method according to any one of the preceding claims, wherein the power switch (20s) of the control system (20) and the supply switch (20’) of the control unit (10) are connected in series.

311. Method according to any one of the preceding claims, comprising a transmission of said control signal by means of, or from, a circuit or contact key (42) of said tool or vehicle (100).

312. Control unit (10) for managing the charging and discharging of a plurality of batteries (B1-B4) housed in a tool or vehicle (100), in particular in a tool or vehicle for gardening or agriculture, even more in particular in a lawnmower tractor, wherein the control unit (10) is configured to be in use operatively interposed between the plurality of batteries (B1-B4) and at least one power user (101 , 102) of the tool or vehicle (100) and comprising:

- a charging operating configuration, wherein said control unit (10):

- selects a first part (B1) of said plurality of batteries (B1-B4),

- causes a selective charging, by a power supply (30) of said first part (B1) of said plurality of batteries (B1- B4),

- selects a further part (B2, B3, B4) of said plurality of batteries (B1-B4) and

- causes a selective charging, by a power supply (30) of said further part (B2, B3, B4) of said plurality of batteries (B1 -B4);

- a power supply operating configuration, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use. transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1) of said plurality of batteries (B1-B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1-B4).

313. Control unit according to claim 312, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101, 102) simultaneously occurring from each battery of said plurality of batteries (B1 -B4).

314. Control unit according to any one of the preceding claims, wherein, in the charging operating configuration, the control unit (10):

- selects a subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4), and

- causes a selective charging, by a power supply (30) of the subsequent part (B2, B3, B4) of said previously selected plurality of batteries (B1-B4).

315. Control unit according to any one of the preceding claims, wherein the selection of the subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4) is alternative to the selection of the first part (B1) of the plurality of batteries (B1-B4) and determines an isolation of said subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4) from the first part (B1) of said plurality of batteries (B1 -B4).

316. Control unit according to any one of the preceding claims, wherein the control unit (10) comprises at least one charge enabling control line (14), operatively connected with a control input of said plurality of batteries (B1-B4); said control unit (10) being configured to select said first part (B1 ) of said plurality of batteries (B1-B4) or to select said subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4) transmitting, in use, a control signal on said at least one control line (14).

317. Control unit according to any one of the preceding claims, wherein said control signal is intended to cause a switch of a supply controller or switch (44) of the first part (B1) or of the subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4) so that a flow of electrical energy coming from said power supply (30) can determine the charging thereof.

318. Control unit according to any one of the preceding claims, wherein said control unit (10) is configured to transmit, on said at least one control line (14) a numerical signal, in particular binary.

319. Control unit according to claim 318, wherein the "Os" and "1s" are transmitted with pulses of different time extension.

320. Control unit according to any one of the preceding claims, comprising a plurality of charge enabling control lines (14), each operatively connected with a control input of a respective battery of said plurality of batteries (B1-B4); said control unit (10) being configured to select a specific battery of said plurality of batteries (B1-B4) by transmitting, in use, a control signal on one of said control lines (14).

321 . Control unit according to any one of the preceding claims, wherein said control signal is intended to cause a switch of a supply controller or switch (44) of the specific battery so that a flow of electrical energy from said power supply (30) can determine the charging thereof.

322. Control unit according to any one of the preceding claims, comprising at least one charge sensor, in particular a voltage sensor, electrically connected with a respective battery of said plurality of batteries (B1-B4), and wherein the control unit (10) is configured to cause an interruption of the charge of the first part (B1) of said plurality of batteries (B1-B4) when the charge sensor detects a charge, in particular a voltage, which is greater with respect to a predetermined threshold value, and to automatically cause the selection of the subsequent part (B2, B3, B4) of said plurality of batteries (B1 -B4) and a de-selection of said first part (B1) of said plurality of batteries (B1 -B4).

323. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically select said at least a first part (B1 ) of said plurality of batteries (B1-B4) or, optionally, the at least one subsequent part (B2, B3, B4) of said plurality of batteries (B1-B4); said control unit (10) being configured to transmit a selection command on at least one control line (14) connected with at least one of said first part (B1 ) and said subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4).

324. Control unit according to any one of the preceding claims, wherein said control line (14) terminates on a control input (15) of at least one among said first part (B1) and said subsequent part (B2, B3, B4) of the plurality of batteries (B1-B4).

325. Control unit according to claims 324, wherein said control unit (10) is configured to transmit a selection command on a control line (14) uniquely associated with a battery of the plurality of batteries (B1-B4) which is intended to be charged.

326. Control unit according to any one of the preceding claims, wherein the control unit is configured to execute an electronic malfunction control and/or electronic control of an improper operating condition, performed, optionally automatically, on each battery of the plurality of batteries (B1-B4);

327. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to exclude at least one battery selected among the batteries of the plurality of batteries (B1-B4) when for said at least one battery of the plurality of batteries said malfunction and/or said improper operating condition is detected, the exclusion determining the exclusion of the selected battery from the power supply step.

328. Control unit according to any one of the preceding claims, wherein the malfunction comprises at least one of a lower operating voltage with respect to a first lower threshold or higher with respect to a second upper threshold, a lower operating temperature with respect to a first lower threshold or higher with respect to a second upper threshold.

329. Control unit according to any one of the preceding claims, wherein the plurality of batteries (B1 -B4) is configured to be removed or inserted "hot", and/or the control unit (10) is configured and specifically intended to allow the removal or introduction of at least one battery of said plurality of batteries (B1 -B4) "hot" and/or during at least the power supply and/or charging, without causing a power interruption of the at least one power user (101 , 102) and/or without causing an interruption of a charging of the remaining batteries of the plurality of batteries (B1 -B4).

330. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to detect a temperature (t) of at least one part of said plurality of batteries (B1-B4) by means of at least one temperature sensor, in particular by means of at least one temperature sensor operatively associated with said plurality of batteries (B1 -B4), and preferably by means of a plurality of temperature sensors each operatively associated with a respective battery (B1-B4).

331 . Control unit according to any one of the preceding claims, wherein the control unit (10) is configured for:

- electronically comparing a signal indicative of the temperature (t) assumed by at least one battery of said plurality of batteries (B1 -B4) with a temperature threshold value (tin), and

- transmitting an activation signal to a respective fan for cooling said at least one battery of said plurality of batteries (B1 -B4) when the signal indicates a temperature (t) greater than said temperature threshold (t™).

332. Control unit according to claim 331 , wherein said control unit (10) is configured for:

- electronically comparing a signal indicative of a plurality of signals indicative of the temperature (t) assumed by each battery of said plurality of batteries (B1-B4) with a temperature threshold value (tin), and

- transmitting an activation signal to a respective fan for cooling each of the batteries of the plurality of batteries (B1-B4) whose signal indicates a temperature (t) greater than said temperature threshold (t™).

333. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to perform a control of a number n of batteries (B1 -B4) operatively connected with the control unit (10), and to electronically determine an enabling of an actuation of at least one priority power user (102) among the plurality of power users (101, 102), or of a priority power user (102) and of a secondary power user (101 ) among the plurality of power users (101 , 102), as a function of said number n of batteries (B1-B4).

334. Control unit (10) for managing the charging and discharging of a plurality of batteries (B1-B4) housed in a tool or vehicle (100), in particular a tool or vehicle for gardening or agriculture; wherein the control unit (10) is configured to be in use operatively interposed between the plurality of batteries (B1-B4) and a plurality of power users (101 , 102) of the tool or vehicle (100) and comprises:

- a charging operating configuration, wherein said control unit (10) selects at least a first part (B1 ) of said plurality of batteries (B1-B4), enabling a charge thereof;

- at least a first power supply operating configuration, wherein the control unit (10) causes a power supply of the plurality of power users (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy simultaneously occurring from at least part of said plurality of batteries (B1 -B4) to said plurality of power users (101, 102), wherein the control unit (10) is configured to perform a control of a number n of batteries (B1 -B4) operatively connected with the control unit (10), and to electronically determine an enabling of an actuation of at least one priority power user (102) among the plurality of power users (101 , 102), or of a priority power user (102) and of a secondary power user (101 ) among the plurality of power users (101 , 102), as a function of the number n of batteries (B1 -B4).

335. Control unit according to any one of the preceding claims, wherein in the charging operating configuration, the control unit (10) causes a selective charging, by a power supply (30) of the first part (B1) of said previously selected plurality of batteries (B1 -B4).

336. Control unit according to any one of the preceding claims, wherein the enabling of the actuation allowed by the control unit (10) is such that:

- as long as the number n of batteries (B1 -B4) is less than a first number i of batteries sufficient to allow enabling the actuation of the priority power user (102), the actuation of the priority power user (102) and the secondary power user (101) is denied;

- as long as the number n of batteries (B1-B4) is equal to or greater than said first number i of batteries sufficient to allow enabling the actuation of the priority power user (102) and less than a second number k, greater than I, of batteries sufficient to allow enabling the actuation of the priority power user (102) and the secondary power user (101 ), the actuation of the priority power user (102) is authorized and the actuation of the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and is greater than the number k of batteries sufficient to allow enabling the actuation of the secondary power user (101 ), the actuation of the priority power user (102) and the secondary power user (101) is authorized.

337. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically detect a voltage value of said at least a first part (B1 ) of the plurality of batteries (B1-B4), in particular when in said battery charging operating configuration.

338. Control unit according to claim 337, wherein said control unit (10) being configured to stop charging said at least a first part (B1) of the plurality of batteries (B1 -B4) when a voltage value of said at least a first part (B1) of the plurality of batteries (B1-B4) reaches a maximum voltage threshold value (V_max), and/or is configured to electronically disable said at least a first part (B1) of the plurality of batteries (B1-B4), such that said at least a first part (B1 ) of the plurality of batteries (B1-B4) is excluded from the power supply of the at least one power user (101 , 102) when the voltage of said at least a first part (B1 ) of the plurality of batteries (B1 -B4) is below a minimum voltage threshold value (V_min).

339. Control unit according to any one of the preceding claims, wherein the control unit (10) comprises at least one charge sensor, in particular a current sensor, electrically connected with at least one respective battery of said plurality of batteries (B1 -B4), said control unit being configured to electronically detect, by means of said charge sensor, a value of a charging current supplied to said at least one part (B1 ) of the plurality of batteries (B1-B4) during the charging operating configuration.

340. Control unit according to claim 339, wherein the control unit (10) is configured to terminate said charging operating configuration of said at least one part (B1) of the plurality of batteries (B1-B4) when the current value exceeds a given maximum safety current value (Imax) and/or falls below a minimum charging current value (Imin).

341 . Control unit according to any one of the preceding claims, wherein the control unit is configured to terminate the charging operating configuration of said at least one part (B1 ) of the plurality of batteries (B1 -B4):

- immediately, when the charging current value is above said maximum safety value (Imax); or

- following a time equal to or greater than a determined waiting time (Tw) if the charging current value remains below said minimum charging current value (Imin) for said waiting time (Tw).

342. Control unit according to any one of the preceding claims, wherein the control unit (10), in said electronic control of said improper operating configuration, is configured to verify a voltage imbalance (AI/(F„, B_n+i)) and/or a charge level imbalance ( SoC(B_n, B_n+i)) between at least a first battery (Bn) and a second battery (Bn+i) of said plurality of batteries (B1 -B4).

343. Control unit according to claim 342, wherein the control unit (10), is configured to verify said voltage imbalance (AI/(F„, F„₊())and/or said charge level imbalance (ASoC(F„, B_n+i)) by executing a comparison, in particular an electronic comparison, between a charge level difference between said at least a first battery (Bn) and a second battery (Bn+i) and a first reference value (Vv1).

344. Control unit according to claim 342 or claim 343, wherein the control unit (10) is configured to verify said voltage imbalance ( V(B_n, B_n+i)) and/or said charge level imbalance ( SoC(B_n, B_n+i)) by executing a comparison, in particular an electronic comparison, between a voltage imbalance ( V B_n, B_n+i))' between said at least a first battery (Bn) and a second battery (Bn+i) and a second reference value (Vv2).

345. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to disable said at least one power user (101 , 102) if the charge level imbalance SoC(B_n, B_n+i) between said at least a first battery (Bn) and a second battery (Bn+i) is greater with respect to said first reference value (Vv1) and/or if the voltage imbalance ( V(B_n, B_n+i))' between said at least a first battery (Bn) and a second battery (Bn+i) is greater with respect to said second reference value (Vv2).

346. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured and specifically intended to cause a selection and/or a limitation, in particular an electronic selection and/or limitation, of a maximum electrical power deliverable by each battery said plurality of batteries (B1-B4).

347. Control unit according to any one of the preceding claims, wherein said control unit (10) is configured to transmit, in particular selectively and/or independently for each battery of the plurality of batteries (B1 -B4), a power management signal to a switch, in particular a bidirectional power switch, of at least one battery selected among the batteries of the plurality of batteries (B1 -B4).

348. Control unit according to any one of the preceding claims, wherein, in the charging operating configuration, the control unit (10) is configured to charge at least a first part of the plurality of batteries (B1-B4) with a predefined charging current, optionally constant, until a predetermined threshold voltage value is reached, the control unit (10) comprising an charging completion operating configuration of said at least a first part of the plurality of batteries (B1- B4), occurring when the voltage of the at least a first part of the plurality of batteries (B1 -B4) exceeds the predetermined threshold voltage value, wherein a charging current of the at least a first part of the plurality of batteries (B1-B4) is progressively reduced, optionally to a substantially zero value.

349. Control unit (10) for managing the charging and discharging of a plurality of batteries (B1-B4) housed in a tool or vehicle (100) is also described, in particular a tool or vehicle for gardening or agriculture; wherein the control unit (10) is configured to be in use operatively interposed between the plurality of batteries (B1 -B4) and at least one power user (101 , 102) of the tool or vehicle (100) and comprises at least a first power supply operating configuration, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy occurring simultaneously from at least part of said plurality of batteries (B1-B4) to at least one power user (101 , 102), wherein the control unit (10) is configured and specifically intended to cause a selection and/or a limitation, in particular an electronic selection and/or limitation, of a maximum electrical power deliverable by each battery of the plurality of batteries (B1 -B4).

350. Control unit according to any one of the preceding claims, wherein the control unit (10) comprises:

- a charging operating configuration, wherein said control unit (10) selects a first part (B1 ) of said plurality of batteries (B1 -B4), enabling a charge thereof;

- causing a selective charging, by a power supply (30) of the first part (B1) of said previously selected plurality of batteries (B1-B4).

351. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to be operatively connected, optionally removably by means of a connector (16), with a management system (20) forming part of said tool or vehicle (100); said management system (20) being operatively interposed between said control unit (10) and said at least one power user (101 , 102).

352. Control unit according to any one of the preceding claims, wherein the management system (20) comprises, or is connected to, a power supply circuit of the tool or vehicle (100).

353. Control unit according to any one of the preceding claims, wherein the control unit (10) comprises a supply switch (20’), controllable by means of a control signal determining, in use, a switching between a closed configuration and an open configuration of said power switch, said supply switch (20’) being configured and intended to determine the power supply or interruption of said at least one power user (101 , 102).

354. Management method for powering a tool or vehicle (100) for gardening or agriculture, even more in particular a lawnmower tractor, the method comprising:

- a power supply step of at least one power user (101 , 102) of said tool or vehicle (100), the at least one power user (101 , 102) comprising a priority power user (102) and a secondary power user (101 ), wherein, in the power supply step, at least one among a first battery (B1) and/or a second battery (B2) of a plurality of batteries (B1 -B4) configured to be removably installed on board said tool or vehicle (100) contributes to supplying said at least one power user (101 , 102) by means of a power supply circuit;

- a step of enabling a power supply of the at least one priority power user (102), or an actuation of the priority power user (102) and the secondary power user (101), wherein

- in the enabling step, an electronic control of at least one value among an electrical power, charge, voltage or current made available by the at least one battery connected to said power supply circuit is executed and/or an electronic control of a number n of batteries (B1-B4) installed on board said tool or vehicle (100) is executed and,

- in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1 -B4), is electronically enabled, and optionally automatically:

- the electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101).

355. Method according to any one of the preceding claims, wherein if said at least one value among an electrical power, charge, voltage or current is greater than a minimum threshold value, the electrical power supply is electronically enabled, by means of the power supply circuit, of the priority power user (102) and of the secondary power user (101) and if the at least one value among an electrical power, charge, voltage or current is less than or equal to a minimum threshold value, the electrical power supply is electronically disabled, by means of the power supply circuit, of the priority power user only (102) and/or the electrical power supply is electronically disabled, by means of the power supply circuit, of said secondary power user (101 ).

356. Method according to any one of the preceding claims, wherein:

- as long as the number n of batteries (B1-B4) is less than a first number I of batteries sufficient to allow enabling the electrical power supply of the priority power user (102), the electrical power supply is electronically disabled by means of the power supply circuit of the priority power user (102) and the secondary power user (101 );

- as long as the number n of batteries (B1 -B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the electrical power supply of the priority power user (102) and less than a second number k, greater than I, of batteries sufficient to allow enabling the electrical power supply of the priority power user (102) and the secondary power user (101), the method includes an electronic enabling of the electrical power supply of the priority power user (102) and an electronic disabling of the electrical power supply of the secondary power user (101 );

- as long as the number n of batteries (B1-B4) is greater than said first number I of batteries sufficient to allow the electrical power supply of the priority power user (102) and greater than the number k of batteries sufficient to allow the electrical power supply of the secondary power user (101 ), the method includes an electronic enabling of the power supply of the priority power user (102) and the secondary power user (101).

357. Method according to any one of the preceding claims, wherein the electronic control of the at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to the power supply circuit comprises transmitting a control signal from at least one among an electrical power, charge, voltage or current sensor to a control unit (10), and/or wherein the electronic control of the number n of batteries (B1-B4) installed on board said tool or vehicle (100) comprises transmitting a battery presence control signal to said control unit (10).

358. Method according to any one of the preceding claims, wherein said control unit (10) is configured to cause, in use, the execution of the electronic enabling step, and optionally automatic, of:

- said electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- said electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101).

359. Method according to any one of the preceding claims, wherein the electronic control of the number n of batteries (B1 -B4) installed on board said tool or vehicle (100) comprises a step of verifying the presence of a voltage, in particular of a non-zero voltage, at at least one electrical contact susceptible in use to contact with at least one of said batteries (B1-B4) when installed on board the tool or vehicle (100).

360. Method according to claim 359, wherein said voltage is the voltage of the at least one battery.

361. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, in particular a lawnmower tractor, configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), the at least one power user (101 , 102) comprising a priority power user (102) and a secondary power user (101) and being configured to be electrically powered,

- a plurality of batteries (B1 -B4), wherein the plurality of batteries (B1 -B4) is configured to be removably installed on board said tool or vehicle (100) and intended to power, at least in part, said at least one power user (101 , 102), by means of a power supply circuit; wherein the control unit (10) is configured for:

- executing an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit and/or an electronic control of a number n of batteries (B1-B4) installed on board the tool or vehicle (100),

- electronically enabling, and optionally automatically, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1-B4):

- the electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of said power supply circuit, of the priority power user (102) and the secondary power user (101).

362. Control unit according to claim 361 , wherein said control unit is configured to be operatively connected with at least one among a first battery (B1) and/or a second battery (B2) of the plurality of batteries (B1 -B4),

363. Control unit according to any one of the preceding claims, wherein the control unit is configured to electronically compare the at least one value among an electrical power, charge, voltage or current with a minimum threshold value, and if the at least one value among an electrical power, charge, voltage or current is greater than said minimum threshold value, the control unit (10) is configured to electronically enable the electrical power, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101 ) and if said at least one value among an electrical power, charge, voltage or current is less than or equal to a minimum threshold value, the control unit (10) is configured to electronically disable the electrical power, by means of the power supply circuit, of the priority power user only (102) and/or to electronically disable the electrical power, by means of the power supply circuit, of said secondary power user (101).

364. Control unit according to any one of the preceding claims, wherein in the control unit,

- as long as the number n of batteries (B1-B4) is less than a first number I of batteries sufficient to allow enabling the electrical power supply of the priority power user (102), the control unit (10) is configured to electronically disable the electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101);

- as long as the number n of batteries (B1 -B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the electrical power supply of the priority power user (102) and less than a second number k, greater than I, of batteries sufficient to allow enabling the electrical power supply of the priority power user (102) and the secondary power user (101), the control unit (10) is configured to electronically enable the electrical power supply of the priority power user (102) and to electronically disable the electrical power supply of the secondary power user (101); - as long as the number n of batteries (B1-B4) is greater than said first number i of batteries sufficient to allow the electrical power supply of the priority power user (102) and greater than the number k of batteries sufficient to allow the electrical power supply of the secondary power user (101 ), the control unit (10) is configured to electronically enable the supply of the priority power user (102) and the secondary power user (101).

365. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to be connected with at least one among an electrical power, charge, voltage or current sensor and to receive, from said sensor, a control signal of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit, and/or to receive a battery presence control signal, indicative of the number n of batteries (B1 -B4) installed on board said tool or vehicle (100).

366. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically, and optionally automatically, enable:

- said electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- said electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101), in accordance with said control signal.

367. Control unit according to any one of the preceding claims, wherein the control unit is configured to be operatively connected with at least one electrical contact susceptible in use to come into contact with at least one of said batteries (B1-B4) when installed on board the tool or vehicle (100).

368. Control unit according to claim 367, wherein the battery presence control signal is a voltage signal, in particular of a non-zero voltage, taken from said electrical contact.

369. Control unit according to claim 368, wherein said voltage signal is indicative of the voltage of said at least one battery.

370. Method for powering a tool or vehicle (100) for gardening or agriculture, even more in particular a lawnmower tractor, the method comprising:

- a power supply step of at least one power user (101 , 102) of said tool or vehicle (100), wherein at least a first battery (B1) installed on board said tool or vehicle (100), optionally at least a first battery (B1 ) and a second battery (B2) of a plurality of batteries (B1-B4) installed on board said tool or vehicle (100), contributes to supplying said power user (101 , 102) by means of a power supply circuit;

- a step of controlling the power supply of said at least one power user (101 , 102) by means of at least one solid-state supply switch circuit (20s’), positioned in series with said at least a first battery (B1 ), optionally positioned in series with said plurality of batteries (B1 -B4), and arranged between said at least a first battery (B1) and said at least one power user (101 , 102), optionally arranged between said plurality of batteries (B1-B4) and said at least one power user (101, 102); wherein:

- the solid-state supply switch circuit (20s’) forms a unidirectional power switch, configured to be switched between a closed configuration, which allows the passage of an electrical current from the at least one battery (B1 -B4), optionally from the plurality of batteries (B1-B4), to the at least one power user (101 , 102) and an open operating configuration, which prevents the passage of said electrical current from the at least one battery (B1 ), optionally from the plurality of batteries (B1 -B4) to the at least one power user (101 , 102), configured to allow the transit of an electrical current in only one direction, and

- the step of controlling the power supply of said at least one power user (101 , 102) comprises at least one switching between said closed configuration and said open configuration.

371. Method according to any one of the preceding claims, wherein said solid-state supply switch circuit (20s’) comprises at least a first field-effect transistor (201) and at least a second field-effect transistor (202), in particular at least a first MOSFET (201 ) and a second MOSFET (202), and a first diode (301 ) and a second diode (302), wherein the first diode (301) is connected between a drain terminal (D1 ) and a source terminal (S1) of the first field-effect transistor (201), and wherein the second diode (302) is connected between a drain terminal (D2) and a source terminal (S2) of the second field-effect transistor (202).

372. Method according to any one of the preceding claims, wherein the step of controlling the power supply of the at least one power user (101 , 102) comprises supplying a first bias signal on a gate terminal (G1 ) of the first field-effect transistor (201) and a second bias signal on a gate terminal (G2) of the second field-effect transistor (202) so that said first field-effect transistor (201), together with said first diode (301), behaves like a substantially ideal diode and so that the second field-effect transistor (202), together with the second diode (302), behaves like a solid-state switch having a closed configuration and an open configuration.

373. Method according to any one of the preceding claims, wherein in the control step, the switching between said closed configuration and said open configuration comprises a switching of the assembly formed by said second diode (302) and by the second field-effect transistor (202) between said closed configuration and said open configuration.

374. Method according to any one of the preceding claims, comprising:

- a selection step, a first part (B1 ) of said plurality of batteries (B1 -B4) being selected in said selection step;

- a charging step, said first part (B1 ) of said plurality of batteries (B1 -B4) being selectively charged in said charging step;

- at least one further selection step, a further part (B2, B3, B4) of said plurality of batteries (B1 -B4) being selected in said further selection step;

- at least one further charging step, said further part (B2, B3, B4) of said plurality of batteries (B1-B4) being selectively charged in said further charging.

375. Method according to any one of the preceding claims, wherein in the power supply step, at least one power user (101 , 102) of said tool or vehicle (100) is powered by a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1) of said plurality of batteries (B1-B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1-B4).

376. Method according to any one of the preceding claims, wherein said selection step, said charging step, said at least one further selection step and said at least one power supply step are controlled by a control unit (10), and wherein the control step of the power supply of said at least one power user (101 , 102) is controlled by said control unit (10).

377. Method according to any one of the preceding claims, comprising a step of configuring a control unit (10) in use controlling at least one among an activation of an electrical power supply, a deactivation of the electrical power supply and an adjustment of the electrical power supplied, by at least part of the plurality of batteries (B1-B4), in particular by at least one among the first battery (B1) and/or the second battery (B2), to the at least one power user (101 , 102).

378. Method according to any one of the preceding claims, wherein, in said configuration step, the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of the electrical power supplied to said at least one power user (101 , 102).

379. Method according to any one of the preceding claims, wherein the at least one power user (101 , 102) comprises a priority power user (102) and a secondary power user (101).

380. Method according to any one of the preceding claims, comprising a step of enabling a power supply of the at least one priority power user (102), or an actuation of the priority power user (102) and the secondary power user (101), wherein in the enabling step an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit is executed and/or an electronic control of a number n of batteries (B1-B4) installed on board said tool or vehicle (100) is executed.

381 . Method according to any one of the preceding claims, wherein, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1 -B4), is electronically enabled, and optionally automatically:

- the electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101).

382. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, in particular a lawnmower tractor, configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), the at least one power user (101 , 102) being configured to be electrically powered,

- at least a first battery (B1), installed on board said tool or vehicle (100), optionally at least a first battery (B1 ) and a second battery (B2) of a plurality of batteries (B1-B4) installed on board the tool or vehicle (100), and wherein, in use, at least the first battery (B1) and optionally at least the first battery (B1) and the second battery (B2) of said plurality of batteries (B1 -B4) contribute to powering said at least one power user (101 , 102), by means of a power supply circuit, the control unit (10) comprising a solid-state supply switch circuit (20s’), positioned in series with said at least a first battery (B1), optionally positioned in series with said plurality of batteries (B1-B4), and arranged between said at least a first battery (B1 ) and said at least one power user (101 , 102), optionally arranged between said plurality of batteries (B1-B4) and said at least one power user (101 , 102),

- said solid-state supply switch circuit (20s’) forming a unidirectional power switch, configured to be switched between a closed configuration, which allows the passage of an electrical current from the at least one battery (B1-B4), optionally from the plurality of batteries (B1-B4), to the at least one power user (101 , 102) and an open operating configuration, which prevents the passage of said electrical current from the at least one battery (B1 ), optionally from the plurality of batteries (B1 -B4) to the at least one power user (101 , 102), configured to allow the transit of an electrical current in only one direction, said control unit (10) comprising a power supply operating configuration wherein it controls the power supply of said at least one power user (101 , 102) by means of the solid-state supply switch circuit (20s’), controlling at least one switching between said closed configuration and said open configuration of said solid-state supply switch circuit (20s’).

383. Control unit according to claim 382, wherein said solid-state supply switch circuit (20s’) is positioned in series with said plurality of batteries (B1-B4).

384. Control unit according to claim 382 or claim 383, wherein said solid-state supply switch circuit (20s’) is arranged between said plurality of batteries (B1-B4) and said at least one power user (101 , 102).

385. Control unit according to any one of the preceding claims, wherein the solid-state supply switch circuit (20s’) comprises at least a first field-effect transistor (201) and at least a second field-effect transistor (202), in particular at least a first MOSFET (201 ) and a second MOSFET (202), and a first diode (301 ) and a second diode (302), wherein the first diode (301) is connected between a drain terminal (D1 ) and a source terminal (S1) of the first field-effect transistor (201), and wherein the second diode (302) is connected between a drain terminal (D2) and a source terminal (S2) of the second field-effect transistor (202).

386. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to control the power supply of said at least one power user (101 , 102), supplying a first bias signal on a gate terminal (G1 ) of the first field-effect transistor (201) and a second bias signal on a gate terminal (G2) of the second field-effect transistor (202) so that said first field-effect transistor (201), together with said first diode (301 ), behaves like a substantially ideal diode and so that the second field-effect transistor (202), together with said second diode (302), behaves like a solid- state switch having a closed configuration and an open configuration.

387. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to control a switching between said closed configuration and said open configuration of said solid-state supply switch circuit (20s’) by controlling a switching of the assembly formed by said second diode (302) and by the second field-effect transistor (202) between said closed configuration and said open configuration.

388. Control unit according to any of the preceding claims, comprising a charging operating configuration, wherein said control unit (10):

- selects a first part (B1) of said plurality of batteries (B1-B4),

- causes a selective charging, by a power supply (30) of said first part (B1) of said plurality of batteries (B1- B4),

- selects a further part (B2, B3, B4) of said plurality of batteries (B1-B4) and

- causes a selective charging, by a power supply (30) of said further part (B2, B3, B4) of said plurality of batteries (B1 -B4).

389. Control unit according to any one of the preceding claims, wherein, in the power supply operating configuration, the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from said first part (B1) of said plurality of batteries (B1-B4) and from said further part (B2, B3, B4) of said plurality of batteries (B1 -B4).

390. Control unit according to any one of the preceding claims, wherein the control unit (10) causes a power supply of the at least one power user (101 , 102) of said tool or vehicle (100), determining, in use, a transfer of electrical energy to said at least one power user (101 , 102) simultaneously occurring from each battery of said plurality of batteries (B1- B4).

391 . Control unit according to any one of the preceding claims, wherein the control unit is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102).

392. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to execute an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit and/or an electronic control of a number n of batteries (B1 - B4) installed on board said tool or vehicle (100).

393. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically enable, and optionally automatically, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1 -B4):

- the electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101).

394. Control unit according to any one of the preceding claims, wherein the at least one power user (101 , 102) comprises a priority power user (102) and a secondary power user (101) and the control unit (10) is configured to cause a power supply of the at least one priority power user (102), or an actuation of the priority power user (102) and the secondary power user (101).

395. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to execute an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to the power supply circuit and/or to execute an electronic control of a number n of batteries (B1 -B4) installed on board said tool or vehicle (100).

396. Control unit according to any one of the preceding claims, wherein said electronic control is in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with the number n of batteries (B1-B4).

397. Control unit according to any one of the preceding claims, wherein the control unit (10) electronically, and optionally automatically, enables:

- the electrical power supply, by means of the power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of the power supply circuit, of the priority power user (102) and the secondary power user (101).

398. Management method for powering a tool or vehicle (100) for gardening or agriculture, even more in particular a lawnmower tractor, the method comprising:

- a power supply step of at least one power user (101 , 102) of said tool or vehicle (100), wherein at least one among a first battery (B1 ) and/or a second battery (B2) of a plurality of batteries (B1-B4) configured to be removably installed on board said tool or vehicle (100), contributes to supplying said power user (101 , 102) by means of a power supply circuit;

- an electronic measurement step of an electrical power (P(t)) instantly absorbed by said at least one power user (101, 102), wherein the electronic measurement step of the instantly absorbed power (P(t)) is executed by a control unit (10) configured to control the power supply of the at least one power user (101 , 102) or is executed by an electronic sensor, operatively connected with said control unit (10),

- an electronic limitation step of the electrical power supplied by said at least a first battery (B1) and/or a second battery (B2), to the at least one power user (101 , 102) by means of the power supply circuit, said electronic limitation step determining a limitation of the electrical power supplied by said at least a first battery (B1 ) and/or a second battery (B2) to at least a first maximum power value.

399. Method according to any one of the preceding claims, wherein said electrical power supplied by said at least a first battery (B1) and/or by said at least a second battery (B2) comprises at least one electric current supplied by said at least a first battery (B1 ) and/or by said at least a second battery (B2).

400. Method according to any one of the preceding claims, wherein the step of electronically limiting the electrical power supplied by said at least a first battery (B1) and/or a second battery (B2) to the at least one power user (101, 102) comprises a step of electronically limiting an electric current supplied by said at least a first battery (B1 ) and/or a second battery (B2) to the at least one power user (101 , 102).

401. Method according to any one of the preceding claims, wherein the first battery (B1) and the second battery (B2) are electrically connected in parallel to supply the at least one power user (101 , 102) by means of said power supply circuit.

402. Method according to any one of the preceding claims, comprising a storage step of at least one datum related to a maximum electrical power deliverable by at least one among said first battery (B1) and said second battery (B2), optionally a storage step of a first datum related to the maximum power deliverable by said first battery (B1) and a second datum related to the maximum power deliverable by said second battery (B2).

403. Method according to any one of the preceding claims, comprising an electronic retrieval step of said at least one datum related to a maximum electrical power deliverable by at least one among said first battery (B1 ) and said second battery (B2). optionally an electronic retrieval step of said first datum related to the maximum power deliverable by said first battery (B1) and said second datum related to the maximum power deliverable by said second battery (B2).

404. Method according to any one of the preceding claims, wherein the maximum electrical power deliverable comprises a maximum electrical current deliverable.

405. Method according to any one of the preceding claims, wherein the datum related to a maximum electrical power deliverable comprises a datum of maximum electrical current deliverable.

406. Method according to any one of the preceding claims, wherein the first maximum power value corresponds to said datum.

407. Method according to claim 406, wherein the first maximum power value corresponds to the first datum.

408. Method according to claim 406 or claim 407, wherein a second maximum power value corresponds to the second datum.

409. Method according to any one of the preceding claims, wherein the electronic limitation of the electrical power supplied by said at least a first battery (B1 ) and/or a second battery (B2) only occurs when the electrical power supplied to the at least one power user (101 , 102) exceeds the value corresponding to said datum, optionally to said first datum and/or to said second datum.

410. Method according to any one of the preceding claims, wherein:

- said electronic limitation step occurs immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding the at least a first maximum power value or

- said electronic limitation step occurs when a power instantly requested by said at least one power user (101 , 102) causes exceeding the at least a first maximum power value for at least one predetermined time interval (At_pmax).

411. Method according to claim 410, wherein:

- said electronic limitation step occurs immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one of said at least a first maximum power value and said second maximum power value or

- said electronic limitation step occurs when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one among said at least a first maximum power value and said second maximum power value, for at least one predefined time interval (At_pmax).

412. Method according to any one of the preceding claims, wherein said first maximum power value comprises, or is, a first maximum electrical current value.

413. Method according to any one of the preceding claims, wherein said second maximum power value comprises, or is, a second maximum electrical current value.

414. Method according to any one of the preceding claims, wherein the limitation step comprises a transmission of a power limitation signal (Sum) to at least one power limitation circuit, said power limitation circuit being positioned within said at least a first battery (B1) and/or a second battery (B2) of said plurality of batteries (B1-B4) and/or being positioned within said control unit (10).

415. Method according to any one of the preceding claims, wherein the at least one power user (101 , 102) comprises a priority power user (102) and a secondary power user (101).

416. Method according to any one of the preceding claims, wherein the method comprises a step of enabling a power supply of the at least one priority power user (102), or an actuation of the priority power user (102) and the secondary power user (101), wherein in the enabling step an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to the power supply circuit is executed and/or an electronic control of a number n of batteries (B1 -B4) installed on board said tool or vehicle (100) is executed.

417. Method according to any one of the preceding claims, wherein, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1 -B4), is electronically enabled, and optionally automatically:

- the electrical power supply, by means of said power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of said power supply circuit, of the priority power user (102) and the secondary power user (101).

418. Method according to any one of the preceding claims, comprising a step of electronically comparing a signal indicative of the temperature (t) assumed by at least one battery of said plurality of batteries (B1-B4) with a temperature threshold value (tin).

419. Method according to any one of the preceding claims, comprising an activation step of at least one fan for cooling least one battery of the plurality of batteries (B1-B4) when the signal indicates a temperature (t) higher than said temperature threshold (t™).

420. Method according to any one of the preceding claims,, comprising a step of forcibly activating said at least one fan for cooling the at least one battery of the plurality of batteries (B1-B4) when the electrical power (P(t)) instantly absorbed by the at least one power user (101 , 102) reaches a predefined power value requiring an active cooling.

421 . Method according to claim 420, wherein the predefined power value requiring an active cooling is substantially equal to 2/3 of the first maximum power value and preferably substantially equal to said first maximum power value.

422. Method according to any one of the preceding claims, comprising a step of configuring a control unit (10), in use controlling at least one among an activation of an electrical power supply, a deactivation of the electrical power supply and an adjustment of the electrical power supplied by at least part of the plurality of batteries (B1 -B4), in particular by at least one among the first battery (B1) and/or the second battery (B2), to the at least one power user (101 , 102), wherein, in said configuration step, the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of the electrical power supplied to said at least one power user (101 , 102).

423. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, in particular a lawnmower tractor, configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), the at least one power user (101 , 102) being configured to be electrically powered,

- at least one of a first battery (B1) and/or a second battery (B2) of the plurality of batteries (B1 -B4), wherein the plurality of batteries (B1 -B4) is configured to be removably installed on board said tool or vehicle (100) and is intended to power, at least in part, said at least one power user (101 , 102), by means of a power supply circuit; the control unit (10) being configured to be operatively connected with, or comprising, at least one electrical sensor intended for measuring a power instantly absorbed (P(t)) by said at least one power user (101 , 102), the control unit (10) is configured to limit to at least a first maximum power value an electrical power supplied by said at least a first battery (B1 ) and/or a second battery (B2), to the at least one power user (101 , 102) by means of the power supply circuit.

424. Control unit according to any one of the preceding claims, wherein the first battery (B1) and the second battery (B2) are electrically connected in parallel to supply the at least one power user (101 , 102) by means of said power supply circuit.

425. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to store at least one datum related to a maximum electrical power deliverable by at least one among said first battery (B1 ) and said second battery (B2), optionally to store a first datum related to the maximum power deliverable by said first battery (B1) and a second datum related to the maximum power deliverable by said second battery (B2).

426. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically retrieve said datum related to a maximum electrical power deliverable by at least one of said first battery (B1) and said second battery (B2), optionally to electronically retrieve said first datum related to the maximum power deliverable by said first battery (B1 ) and said second datum related to the maximum power deliverable by said second battery (B2).

427. Control unit according to any one of the preceding claims, wherein the first maximum power value corresponds to said datum.

428. Control unit according to claim 427, wherein the first maximum power value corresponds to the first datum.

429. Control unit according to claim 427 or claim 428, wherein a second maximum power value corresponds to said second datum.

430. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically limit the electrical power supplied by said at least a first battery (B1) and/or a second battery (B2) only when the electrical power supplied to the at least one power user (101 , 102) exceeds the value corresponding to said datum, optionally to said first datum and/or to said second datum.

431 . Control unit according to any one of the preceding claims, wherein the control unit is configured to electronically limit the electrical power immediately when a power instantly requested by said at least one power user (101 , 102) causes exceeding the at least a first maximum power value or is configured to electronically limit the electrical power when a power instantly requested by said at least one power user (101 , 102) causes exceeding the at least a first maximum power value for at least a predetermined time interval (At_pmax).

432. Control unit according to claim 431 , wherein the control unit is configured to electronically limit the electrical power immediately when a power instantly requested by the at least one power user (101 , 102) causes exceeding at least one among said at least a first maximum power value and said second maximum power value, or is configured to electronically limit the electrical power when a power instantly requested by said at least one power user (101 , 102) causes exceeding at least one among said at least a first maximum power value and said second maximum power value, for at least a predetermined time interval (At_pmax).

433. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to limit the electrical power by transmitting a power limitation signal (Siim) to at least one power limitation circuit, said power limitation circuit being positioned within said at least a first battery (B1), and/or transmitting said power limitation signal (Siim) to a second battery (B2) of said plurality of batteries (B1 -B4) and/or being positioned within said control unit (10).

434. Control unit according to any one of the preceding claims, wherein the control unit is configured to execute an electronic control of at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit and/or an electronic control of a number n of batteries (B1 -B4) installed on board said tool or vehicle (100).

435. Control unit according to any one of the preceding claims, wherein the control unit is configured to electronically enable, and optionally automatically, in accordance with said at least one value among an electrical power, charge, voltage or current and/or in accordance with said number n of batteries (B1-B4):

- the electrical power supply, by means of said power supply circuit, of only the priority power user (102); or

- the electrical power supply, by means of said power supply circuit, of the priority power user (102) and the secondary power user (101).

436. Control unit according to any one of the preceding claims, wherein the control unit is configured to electronically compare a signal indicative of the temperature (t) taken by at least one battery of the plurality of batteries (B1-B4) with a temperature threshold value (tin), and transmit an activation signal to at least one fan for cooling the at least one battery of the plurality of batteries (B1-B4) when said signal indicates a temperature (t) higher than said temperature threshold (tin).

437. Control unit according to any one of the preceding claims, wherein the control unit is configured to transmit an activation signal to at least one fan for cooling the at least one battery of the plurality of batteries (B1-B4) when the electrical power (P(t)) instantly absorbed by the at least one power user (101 , 102), reaches a predefined power value requiring an active cooling.

438. Control unit according to claim 437, wherein the predefined power value requiring an active cooling is substantially equal to 2/3 of the first maximum power value and preferably substantially equal to said first maximum power value.

439. Control unit according to any one of the preceding claims, wherein the control unit is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to the at least one power user (101 , 102).

440. Management method for powering a tool or vehicle (100) for gardening or agriculture, even more in particular a lawnmower tractor, the method comprising:

- a power supply step of at least one power user (101 , 102) of said tool or vehicle (100), wherein at least one among a first battery (B1) and/or a second battery (B2) of a plurality of batteries (B1-B4) installed on board the tool or vehicle (100), contributes to supplying said power user (101 , 102) by means of a power supply circuit; a step of configuring a control unit (10) in use controlling at least one among an activation of an electrical power supply, a deactivation of the electrical power supply and an adjustment of the electrical power supplied, by at least part of the plurality of batteries (B1 -B4), in particular by at least one among the first battery (B1) and/or the second battery (B2), to the at least one power user (101 , 102), wherein, in said configuration step, the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of the electrical power supplied to the at least one power user (101 , 102).

441 . Method according to any one of the preceding claims, wherein, following the configuration step and/or following a connection or disconnection of said at least one battery of the plurality of batteries (B1 -B4), in particular following a connection or disconnection of one among said first battery (B1) and said second battery (B2), a step of filtering and/or limiting voltage and/or current peaks and/or drops is included upstream of the at least one power user (101 , 102), in particular upstream of the power supply circuit of the power user (101 , 102).

442. Method according to any one of the preceding claims, wherein the method comprises a step of connecting or disconnecting said at least one battery of the plurality of batteries (B1-B4) comprising a step of introducing or extracting said at least one battery from a respective compartment (V1 , V2) positioned on said tool or vehicle (100).

443. Method according to any one of the preceding claims,, wherein the method comprises a step of enabling an actuation of the at least one priority power user (102) among the plurality of power users (101 , 102), or of an actuation of the priority power user (102) and the secondary power user (101 ) among the plurality of power users (101 , 102), as a function of a number n of batteries (B1-B4).

444. Method according to claim 443, wherein the enabling of the actuation is such that:

- as long as the number n of batteries (B1-B4) is less than a first number I of batteries sufficient to allow enabling the actuation of the priority power user (102), the actuation of the priority power user (102) and the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and less than a second number k, greater than I, of batteries sufficient to allow enabling the actuation of the priority power user (102) and the secondary power user (101), the actuation of the priority power user (102) is authorized and the actuation of the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and greater than the number k of batteries sufficient to allow enabling the actuation of the secondary power user (101), the actuation of the priority power user (102) and the secondary power user (101) is authorized.

445. Method according to any one of the preceding claims, wherein the control unit (10) allows the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to the priority power user (102) and determining a powering down or an electrical power supply of the secondary power user (101) in accordance with at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to said power supply circuit.

446. Method according to any one of the preceding claims, wherein, following the disconnection step, the control unit (10) automatically performs an electronic verification step of whether at least one among an electrical power, charge, voltage or current, made available by the at least one battery connected to the power supply circuit is sufficient to power the at least one power user (101 , 102), preferably the at least one among said priority power user (102) and said secondary power user (101).

447. Method according to claim 446, wherein, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to the power supply circuit, the control unit (10) executes an electronic limitation of a power which can be provided to said at least one power user (101 , 102) and/or of power absorbable by said at least one power user (101, 102), preferably an electronic limitation of the power which can be provided to the priority power user (102) and/or to the secondary power user (101), and/or of power absorbable by the priority power user (102) and/or by the secondary power user (101 ).

448. Method according to claim 446 or claim 447, wherein, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to the power supply circuit, the control unit (10) executes said powering down of the secondary power user (101).

449. Method according to any one of claims 446 to 448, wherein, following said electronic verification step and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to the power supply circuit, the control unit (10) executes a powering down of said priority power user (102).

450. Method according to any one of claims 446 to 449, wherein the control unit (10) allows an electrical power supply of at least itself and of electrical control circuits of the priority (102) and/or secondary (101 ) power user.

451. Control unit (10) for a tool or vehicle (100) for gardening or agriculture, in particular a lawnmower tractor, configured to be operatively connected with:

- at least one power user (101 , 102) of said tool or vehicle (100), the at least one power user (101 , 102) being configured to be electrically powered,

- a plurality of batteries (B1-B4), and in particular to be operatively connected with at least one among a first battery (B1 ) and/or a second battery (B2) of the plurality of batteries (B1-B4), wherein the plurality of batteries (B1-B4) is configured to be installed on board the tool or vehicle (100) and is intended to power, at least in part, said at least one power user (101 , 102), by means of a power supply circuit, wherein the control unit (10) is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1 -B4), in particular of one among the first battery (B1 ) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to the at least one power user (101, 102).

452. Control unit according to any one of the preceding claims, comprising a step of filtering and/or limiting voltage and/or current peaks and/or drops, executing, in use, a filtering and/or limiting of voltage and/or current peaks and/or drops, upstream of the at least one power user (101 , 102), in particular upstream of the power supply circuit of the power user (101 , 102).

453. Control unit according to any one of the preceding claims, wherein the control unit is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102), following an introduction or extraction of the first battery (B1) or the second battery (B2) from a respective compartment (V1 , V2) positioned on said tool or vehicle (100).

454. Control unit according to any one of the preceding claims, wherein said control unit is specifically intended to cause a selection and/or a limitation, in particular an electronic selection and/or limitation, of a maximum electrical power deliverable by each battery of the plurality of batteries (B1-B4) and wherein said control unit (10) is configured to transmit, in particular selectively and/or independently for each battery of the plurality of batteries (B1-B4), a power management signal to a switch, in particular a bidirectional power switch, of at least one battery selected among the batteries of said plurality of batteries (B1-B4).

455. Control unit according to any one of the preceding claims, wherein said control unit (10) is configured to enable an actuation of the priority power user (102) among the plurality of power users (101 , 102), or an actuation of the priority power user (102) and the secondary power user (101) among the plurality of power users (101 , 102), as a function of the number n of batteries (B1-B4).

456. Control unit according to any of the preceding claims, wherein the enabling of the actuation is such that:

- as long as the number n of batteries (B1-B4) is less than a first number I of batteries sufficient to allow enabling the actuation of the priority power user (102), the actuation of the priority power user (102) and the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is equal to or greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and less than a second number k, greater than I, of batteries sufficient to allow enabling the actuation of the priority power user (102) and the secondary power user (101), the actuation of the priority power user (102) is authorized and the actuation of the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is greater than said first number I of batteries sufficient to allow enabling the actuation of the priority power user (102) and greater than the number k of batteries sufficient to allow enabling the actuation of the secondary power user (101), the actuation of the priority power user (102) and the secondary power user (101) is authorized.

457. Control unit according to any one of the preceding claims, wherein the control unit is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1-B4), in particular of one among the first battery (B1) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to the at least one priority power user (102) and to determine a powering down or an electrical power supply of the secondary power user (101 ) in accordance with at least one value among an electrical power, charge, voltage or current, made available by the at least one battery connected to the power supply circuit.

458. Control unit according to any one of the preceding claims, wherein, in use, following the disconnection of at least one battery, the control unit (10) is configured to automatically perform an automatic electronic verification step of whether at least one among an electrical power, charge, voltage or current, made available by the at least one battery connected to the power supply circuit is sufficient to power the at least one power user (101 , 102), preferably the at least one among said priority power user (102) and said secondary power user (101).

459. Control unit according to claim 458, wherein the control unit (10) is configured to perform, following said electronic verification and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said power supply circuit, an electronic limitation of a power which can be provided to the at least one power user (101 , 102) and/or of power absorbable by the at least one power user (101 , 102), preferably an electronic limitation of the power which can be provided to the priority power user (102) and/or to the secondary power user (101), and/or of power absorbable by the priority power user (102) and/or by the secondary power user (101 ).

460. Control unit according to claim 458 or claim 459, wherein the control unit (10) is configured to perform, following said electronic verification and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to the power supply circuit, said powering down of the secondary power user (101).

461 . Control unit according to any one of claims 458 to 460, wherein the control unit (10) is configured to perform, following said electronic verification and in accordance with at least one value among electrical power, charge, voltage or current, made available by the at least one battery residually connected to said power supply circuit, a powering down of the priority power user (102).

462. Control unit according to any one of claims 458 to 461 , wherein the control unit (10) is configured to allow an electrical power supply of at least itself and of electrical control circuits of the priority (102) and/or secondary (101) power user.

463. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to electronically identify one or more of the batteries (B1-B4) installed on the tool or vehicle for gardening or agriculture.

464. Control unit according to claim 463, wherein the control unit (10) is configured to uniquely identify one or more of the batteries (B1-B4) installed on board said tool or vehicle for gardening or agriculture.

465. Control unit according to any one of the preceding claims, wherein the control unit (10) is configured to transmit to a remote electronic device at least one data identifier of said one or more batteries (B1 -B4).

466. Control unit according to claim 465, wherein the control unit (10) is configured to transmit said at least one data identifier of said one or more batteries (B1 -B4) electronically associated with a residual charge and/or voltage datum of said one or more batteries (B1-B4).

467. Control unit according to claim 465 or claim 466, wherein the control unit (10) is configured to transmit said at least one data identifier of said one or more batteries (B1 -B4) by means of a wireless interface module.

468. Method according to any one of the preceding claims, comprising an electronic identification step of one or more of the batteries (B1-B4) installed on said tool or vehicle for gardening or agriculture, said identification step being a unique identification step of one or more of the batteries (B1-B4) installed on said tool or vehicle for gardening or agriculture.

469. Method according to any one of the preceding claims, comprising a step of transmitting to a remote electronic device at least one data identifier of said one or more batteries (B1 -B4), the step of transmitting being able to occur by means of a wireless interface module.

470. Method according to claim 469, wherein, in particular in said transmission step, said at least one data identifier of said one or more batteries (B1-B4) is electronically associated with a residual charge and/or voltage datum of said one or more batteries (B1 -B4).

471. Vehicle for gardening or agriculture (100), said vehicle comprising at least one power user (101 , 102), in particular at least one traction motor (102) for the movement of the vehicle itself, said vehicle for gardening or agriculture (100) comprising a plurality of batteries (B1-B4) electrically connected with said power user (101 , 102) and comprising a control unit (10), said control unit being in particular according to any one of the preceding claims.

472. Vehicle according to any one of the preceding claims, wherein said vehicle for gardening or agriculture (100) is a lawnmower tractor.

473. Vehicle according to any one of the preceding claims, wherein the at least one power user (101 , 102) comprises at least one traction motor (102).

474. Vehicle according to any one of the preceding claims, wherein the at least one power user (101 , 102) comprises a mowing plate or bar (101 ).

475. Vehicle according to any one of the preceding claims, wherein the mowing plate or bar (101) is positioned in a lower portion of the lawnmower tractor, in particular below the chassis of the lawnmower tractor.

476. Vehicle according to any one of the preceding claims, comprising at least one pair of traction wheels, or tracks (105) operatively connected with said at least one traction motor (102).

477. Vehicle according to any one of the preceding claims, wherein the vehicle for gardening or agriculture (100), in particular said lawnmower tractor, comprises a driving seat (103).

478. Vehicle according to any one of the preceding claims, comprising a first and a second traction motor coupled to a first and a second tractor wheel or tractor track (105), respectively.

479. Vehicle according to any one of the preceding claims, wherein said first and second traction motor are independently controllable, optionally by means of a steering device (104).

480. Vehicle according to any of the preceding claims comprising at least a first axle, or front axle, and a second axle, or rear axle.

481 . Vehicle according to any one of the preceding claims, comprising at least one compartment (V1-V3) configured and specifically intended to house said plurality of batteries (B1-B4).

482. Vehicle according to any one of the preceding claims, wherein said at least one compartment (V1-V3) is arranged in a substantially central position, optionally barycentric, of the vehicle for gardening or agriculture (100) and/or substantially below the driving seat (103).

483. Vehicle according to any one of the preceding claims, wherein said at least one compartment (V1-V3) comprises at least one slide configured to allow the introduction of at least part of the plurality of batteries (B1-B4) within the at least one compartment (V1-V3) and/or to allow the extraction of at least part of the plurality of batteries (B1 -B4) from said at least one compartment (V1-V3).

484. Vehicle according to any one of the preceding claims, wherein said at least one compartment (V1-V3) comprises at least one door, provided to protect an internal cavity of the compartment adapted to house at least one of the plurality of batteries (B1-B4).

485. Vehicle according to any one of the preceding claims, wherein said at least one compartment (V1-V3) comprises at least one fan, controllable at least in activation or deactivation, intended to cause a cooling of at least part of the plurality of batteries, and/or at least one battery of the plurality of batteries (B1-B4) comprises at least one fan, controllable at least in activation or deactivation, intended to cause a cooling thereof.

486. Vehicle according to any one of the preceding claims, comprising a management system (20) operatively interposed between said control unit (10) and said at least one power user (101 , 102).

487. Vehicle according to claim 486, wherein the management system (20) is removably connected, by means of a connector (16), with said control unit (10).

488. Vehicle according to any one of the preceding claims, wherein the management system (20) comprises a power switch (20s) controllable in the switching between opening and closing by a control signal.

489. Vehicle according to claim 488, wherein said control signal is from a circuit or contact key (42) of said vehicle (100).

490. Vehicle according to any one of the preceding claims, wherein said power switch (20s) is operatively connected with the power supply circuit of the at least one power user (101 , 102).

491. Vehicle according to any one of the preceding claims, wherein said power switch (20s) and said internal power switch are placed in series.

492. Tool or vehicle (100) for gardening or agriculture, in particular a lawnmower tractor, comprising:

- at least one power user (101 , 102) configured to be electrically powered,

- a power supply circuit for said at least one power user (101 , 102),

- a plurality of batteries (B1 -B4), in particular comprising at least a first battery (B1) and a second battery (B2), said plurality of batteries (B1 -B4) being configured to power said at least one power user (101 , 102),

- a control unit (10) operatively connected to said at least one power user (101 , 102) and to said plurality of batteries (B1-B4), wherein the control unit (10) is configured to allow the connection or disconnection of at least one battery of the plurality of batteries (B1 -B4), in particular of one among the first battery (B1 ) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to the at least one power user (101, 102).

493. Tool or vehicle according to any one of the preceding claims, wherein the control unit comprises a step of filtering and/or limiting voltage and/or current peaks and/or drops, executing, in use, a filtering and/or limiting of voltage and/or current peaks and/or drops, upstream of the at least one power user (101 , 102), in particular upstream of the power supply circuit of the power user (101 , 102).

494. Tool or vehicle according to any one of the preceding claims, comprising at least one compartment (V1 , V2) intended to contain at least one among said first battery (B1) and said second battery (B2), wherein the control unit (10) is configured to allow the connection or disconnection of at least one of the plurality of batteries (B1-B4), in particular of one among the first battery (B1 ) and the second battery (B2), from the power supply circuit, without interruption of an electrical power supply provided to said at least one power user (101 , 102), following an introduction or extraction of the first battery (B1) or the second battery (B2) from the respective compartment (V1 , V2).

495. Tool or vehicle according to any one of the preceding claims, comprises a plurality of power users (101 , 102), said plurality of power users (101 , 102) comprises a priority power user (102) and a secondary power user (101), wherein said control unit is specifically intended to cause a selection and/or a limitation, in particular a selection and/or an electronic limitation, of a maximum electrical power deliverable by each battery of the plurality of batteries (B1 -B4).

496. Tool or vehicle according to claim 495, wherein said control unit (10) is configured to transmit, in particular selectively and/or independently for each battery of the plurality of batteries (B1 -B4), a power management signal to a switch, in particular a bidirectional power switch, of at least one battery selected among the batteries of the plurality of batteries (B1 -B4).

497. Tool or vehicle according to claim 495 or claim 496, wherein said control unit (10) is configured to enable an actuation of the priority power user (102) among the plurality of power users (101 , 102), or an actuation of the priority power user (102) and the secondary power user (101 ) among the plurality of power users (101 , 102), as a function of the number n of batteries (B1-B4).

498. Tool or vehicle according to any of the preceding claims, wherein the enabling of the actuation is such that:

- as long as the number n of batteries (B1-B4) is less than a first number i of batteries sufficient to allow enabling the actuation of the priority power user (102), the actuation of the priority power user (102) and the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is equal to or greater than said first number i of batteries sufficient to allow enabling the actuation of the priority power user (102) and less than a second number k, greater than i, of batteries sufficient to allow enabling the actuation of the priority power user (102) and the secondary power user (101), the actuation of the priority power user (102) is authorized and the actuation of the secondary power user (101 ) is denied;

- as long as the number n of batteries (B1 -B4) is greater than said first number i of batteries sufficient to allow enabling the actuation of the priority power user (102) and greater than the number k of batteries sufficient to allow enabling the actuation of the secondary power user (101), the actuation of the priority power user (102) and the secondary power user (101) is authorized.

499. Tool or vehicle according to any one of the preceding claims, comprising a management system (20) operatively interposed between said control unit (10) and said at least one power user (101 , 102).

500. Tool or vehicle according to claim 499, wherein the management system (20) is removably connected, by means of a connector (16), with said control unit (10).

501 . Tool or vehicle according to any one of the preceding claims, wherein the management system (20) comprises a power switch (20s) controllable in the switching between opening and closing by a control signal.

502. Tool or vehicle according to claim 501 , wherein said control signal is from a circuit or contact key (42) of said tool or vehicle (100).

503. Tool or vehicle according to any one of the preceding claims, wherein said power switch (20s) is operatively connected with the power supply circuit of the at least one power user (101 , 102).

504. Tool orvehicle according to any one of the preceding claims, wherein said power switch (20s) and said internal power switch are placed in series.

505. Kit comprising a vehicle for gardening or agriculture (100), said vehicle being in particular according to any of the preceding claims, and at least one battery (B1 -B4), optionally a plurality of batteries (B1 -B4).

506. Kit according to any one of the preceding claims, wherein the plurality of batteries (B1 -B4) is configured and specifically intended to be subjected to a charging and/or discharging control by means of a control unit (10), said control unit being in particular according to any one of the preceding claims.

507. Kit according to any one of the preceding claims, wherein at least part of the batteries of the plurality of batteries (B1-B4) is lithium.

508. Use of a control unit (10) for controlling a vehicle for gardening or agriculture (100), in particular for controlling a lawnmower tractor, said control unit being in particular according to any of the preceding claims.

509. Computer program, comprising portions of software code, said computer program being configured to be executed by at least one control unit (10), said portions of software code causing, in use, the execution of one or more of the steps of a method, said method being in particular according to any one of the preceding claims.