To provide electric apparatus which can surely protect a device body, by monitoring the abnormal heating of the device body in a pack battery and interrupting power supply to the device body on the pack battery side, when there is abnormal heating.

The electric apparatus includes the device body, such as a note type PC, and the pack battery which is attached to the device body for supplying power to the device body. A temperature sensor which detects abnormal heating of the device body is incorporated in the device body; and the pack battery is provided with a device body temperature monitoring means, which monitors the output of the temperature sensor and actuates the protective circuit of the pack battery in the abnormal heating of the device body and interrupts the power output from the pack battery.

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