| 摘要 |
A battery check device, suitable for use in a camera, for reliably checking the essential capacity of a battery power source without affecting the voltage recovery of the battery power source after a long period of non-use. The battery check device monitors a starting switch, for example, a main switch or a release button, with a timer circuit and compares a switch interval between a previous time the starting switch was set ON and a present time the starting switch is set ON with a predetermined time. When the switch interval is within the predetermined time, a battery check circuit checks the power supply capacity of the battery power source using a light load circuit. When the interval is not within the predetermined time, the battery check circuit checks the power supply capacity of the battery using a heavy load circuit.
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