Patent ID: 8825119

Claim:
A telephone system comprising: a cellular phone, having a cellular communicator; a power connection for receiving an external electrical power, a connection for an internal battery, where the external electrical power from the power connection charges the internal battery, and the internal battery also powers the cellular phone; the cellular phone having a battery door, that can be connected to the cellular phone to cover the battery, and can be removed from the cellular phone to expose the battery; an RFID device that is attached to the battery door of the cellular phone and where the RFID device wirelessly communicates; the cellular communicator which allows communicating over a channel, the communicator powered from the battery connection; wherein the RFID device receives power from the cellular phone battery when the battery door is connected to the cellular phone to cover the battery, wherein the RFID device has contacts that extend from the battery door to the cellular phone to receive the power.