PURPOSE: To enhance the workability of funnels, to permit the reservation of an electrolyte with high accuracy and to enhance an yield by providing the funnels having a valve mechanism opened when centrifugal force is exerted.

CONSTITUTION: A housing member 44 for housing an electrolyte-free cylindrical nickel hydrogen secondary battery B is placed under the nozzles 28 of electrolyte-reserving means 8, 14, etc., respectively. Next, an electrolyte is housed in funnels 27, using electrolyte-supplying means 50, etc. A disk 3 is then continuously rotated in a counterclockwise fashion. With rotating speed increased, the means 8, etc., is radially tilted to part from the disk 3 and is then horizontally placed. Consequently, centrifugal force is applied to the electrolyte housed in the funnel 27 of the means 8, etc., and a valve body 29. The valve body 29 resists against energizing force provided by a coil spring 31, being lowered toward a spring washer 30. Thus the valve body 29 is kept away from the valve seat of the funnel 27 at its outlet part 33 to open the outlet part 33. The electrolyte in the funnel 27 is traveled the outlet part 33 and is transferred in the nozzle 28. Reservation with high accuracy is available from the outlet hole of the nozzle 28 to the battery B.