Patent ID: 7979728

Claim:
A device comprising: a power supply; a port coupled to said power supply to provide power connections from said port, said port for connecting an external rechargeable device; and a power management element coupled to said power supply and said port for controlling normal powering down of the device; wherein said power management element determines the connection of a rechargeable external device to the port and limits the powering down of the device so that the rechargeable external device continues to receive power from said port, wherein limiting the powering down includes: allowing selected portions of the device other than said port to be powered down; periodically powering up selected portions of the device to determine if the rechargeable external device is recharged; if the rechargeable external device is not recharged, powering down said portions of the device that were powered up; and if the rechargeable external device is recharged, no longer limiting powering down of the device.