Patent ID: 8904197

Claim:
A method for managing power usage of one or more devices, the method comprising: responsive to a first input received at a first input device, a first amount of power supplied from a power supply to a processor and power supplied from the power supply to a display device, a second input device and a communication unit in a ready state, transitioning from an off state where the power supply does not supply power to the display device, the communication unit, the second input device and the processor to the ready state, wherein the communication unit comprises a plurality of transceivers including a wireless transceiver; transitioning from the ready state to a dozing state responsive to the second input device and the display device not receiving a second input for a predetermined length of time, ceasing to supply power from the power supply to the communication unit in the dozing state and decreasing, but not ceasing, power supplied to the processor in the dozing state; operating in a wait state by supplying power to the display device, the second input device and the processor while providing a low amount of power from the power supply to a first transceiver included in the communication unit and not supplying power to a second transceiver included in the communication unit; and responsive to receiving a third input to access an inbox or to submit a document while operating in the wait state, operating in a first transceiver test state by providing the low amount of power from the power supply to the first transceiver and not supplying power to the second transceiver.