Patent ID: 8502505

Claim:
A battery-driven device that is driven by a chargeable battery, comprising: a storage unit operable to store therein one or more voltage thresholds in one-to-one association with one or more operations to be executed by the battery-driven device, each voltage threshold representing a voltage, immediately after a start of discharging of a battery that is fully charged, at which the voltage of the battery changes from a sharp voltage drop to a moderate voltage drop during execution of one of the operations associated therewith; a voltage measuring unit operable to measure a voltage of the battery during the execution of one of the operations; a specifying unit operable to specify the one of the operations being executed by the battery-driven device; an acquisition unit operable to acquire one of the voltage thresholds that corresponds to the specified operation from the storage unit; a voltage comparison unit operable to compare the acquired voltage threshold with the measured voltage; and a control unit operable to control power consumption of the battery to decrease during the execution of the specified operation if the measured voltage is equal to or more than the acquired voltage threshold.