| 摘要 |
A power supply device includes a power generation unit; a plurality of storage batteries configured to be charged with power output from the power generation unit; a monitoring unit configured to monitor a state of each storage battery and the power output from the power generation unit; and a control unit configured to select one of the storage batteries to supply power to a target device on the basis of a monitoring result by the monitoring unit when the target device is in a power saving mode, the control unit being configured to control charging of each storage battery.
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