Patent ID: 8450979

Claim:
A method for powering an electronic device from an adapter having an internal adapter battery, the method comprising: determining if the adapter is connected to a power source; in the event the adapter is connected to the power source, determine if the device is connected to the adapter, the device comprising an electronic device battery; in the event the device is connected to the adapter, operating the device from the power source; and in the event the device is not connected to the adapter, charging the internal adapter battery and in the event the adapter is not connected to the power source, and if the device is connected to the adapter, determining if a charge of the electronic device battery exceeds a first threshold; in the event the charge of the electronic device battery exceeds the first threshold, determining if a charge of the internal adapter battery exceeds a second threshold; and in the event the charge of the internal adapter battery exceeds the second threshold, powering the electronic device from the internal adapter battery.