Patent ID: 7830668

Claim:
A power supply unit for a mobile computerized device comprising: a housing including a handle for coupling and decoupling the power supply unit with the mobile computerized device; a battery positioned within the housing; an electrical connector configured to electrically connect the power supply unit with the mobile computerized device when coupled therewith; and a detector configured to detect user interaction with the handle and generate a signal in response to detecting user interaction with the handle, the detector having a first output state and a second output state comprising a user interaction state; the power supply unit further having a first on-state where electrical power is discharged from the battery to the electrical connector and the detector is in the first output state, and a second on-state where electrical power is discharged from the battery to the electrical connector and the detector is in the second output state; and the power supply unit further including an off-state where electrical power is not discharged from the battery to the electrical connector, and the power supply unit being configured to switch from the second on-state to the off-state in response to the signal.