BATTERY CHARGER AND POWER SUPPLY APPARATUS

摘要

A battery charger (20) of a power supply apparatus (1) can, mechanically and electrically, freely connect to and disconnect from a battery (10) for supplying electrical power to an electrically assisted bicycle (100) constituting a specific device, another device is electrically connected thereto, and an alternating-current socket (31) and/or USB connection terminal (32) is provided thereto for supplying electrical power of the battery (10) to the other device.