Patent ID: 7251509

Claim:
A power management system for a mobile phone having as a primary power source a cell array and having as a backup power source a rechargeable battery, the power management system comprising: a first switch positioned to control power to or from the cell array; and a second switch positioned to control power to or from the battery supply, when in response to a power requirement from the mobile phone being equal to or less than an cell array power provided by the cell array, said first switch and said second switch automatically set, by the power management system, to supply the mobile phone with only said cell array power, and wherein any excess cell array power not consumed by the mobile phone is at the same time automatically directed to recharge the rechargeable battery, when in response to said power requirement from the mobile phone being greater than said cell array power but less than a combined power provided from the cell array and the battery, said first switch and said second switch automatically set, by the power management system, to supply the mobile phone with only said battery power provided by the rechargeable battery and said cell array power is at the same time automatically directed to recharge the rechargeable battery.