POWER-RECEIVING APPARATUS AND WIRELESS POWER-TRANSFER SYSTEM

A power-receiving apparatus includes a power supply unit and a wireless communication unit. The power supply unit includes a first rechargeable battery that accumulates power, a power-receiving unit that receives power transferred from a power-transfer apparatus by using a radio system, and a power controller that, in a wireless charging mode, performs control of charging of the first rechargeable battery in accordance with the power received by the power-receiving unit and stops supply of the power to a main controller. The wireless charging mode is set for wirelessly charging the first rechargeable battery as an operation mode. The main controller performs control of predetermined operations of the power-receiving apparatus. The wireless communication unit operates when receiving supply of the power from the power supply unit and wirelessly communicates with the power-transfer apparatus.