Patent ID: 8237401

Claim:
An electronic device capable of using a rechargeable battery, comprising: a casing; a battery housing received in the casing for receiving the rechargeable battery, the battery housing comprising two electrical contacts for electrically connecting two electrodes of the rechargeable battery; and a receiver fixed to a surface of the casing of the electronic device, the receiver comprising a receiving coil, the two ends of the receiving coil being connected to the two electrical contacts of the battery housing respectively, the receiving coil being a planar spiral coil substantially parallel to the surface of the casing of the electronic device, the receiving coil configured for inductively coupling to a magnetic field produced by a power supply, and the receiver further comprising a plurality of electromagnets surrounding the receiving coil, the plurality of electromagnets being connected to the rechargeable battery, wherein a switch is disposed between the plurality of electromagnets and the rechargeable battery and is turned on when the battery is recharged.