In a charging unit, a configuration is obtained in which power stored in a battery can be prevented from being unnecessarily consumed when a device is not being used. The charging unit (10) includes a power receiver (13) (power receiving coil) that receives power from a power feeder (2) (charger), a battery (12) that is charged with power received by the power receiver (13), a charge controller (14) that is provided between the power receiver (13) and the battery (12), and controls the battery (12), and a disconnecting section (15) (relay) that is provided between the battery (12) and the charge controller (14), and electrically disconnects the battery (12) and the charge controller (14) when the battery (12) is not being charged.