Patent ID: 6999800

Claim:
A method for power management of a smart phone having a power system, a mobile phone system operated in a standby, sleep, connection or off mode, and a PDA system operated in a normal, sleep or off mode, the method comprising steps of: resetting the smart phone; searching for network service for the mobile phone system; operating the mobile phone system in standby mode and the PDA system in normal mode when the network is located and connected to; switching the mobile phone system from standby mode to connection mode when establishing communication with a remote terminal of the network; switching the mobile phone system from standby mode to sleep mode when the mobile phone system has been idle for a first period of time; switching the PDA system from normal mode to sleep mode when the PDA system has been idle for a second period of time; and implementing a power detection method comprising steps of: detecting an amount of power of a source in the power system; switching the mobile phone system to off mode when the detected amount is less than a first threshold; and switching the PDA system to off mode when the detected amount is less than a second threshold.