Patent ID: 7698587

Claim:
A portable electronic apparatus with a power saving function, comprising: a data storage for storing a power management table that lists relationships between electric charge ranges and work modes of the apparatus; a CPU (central processing unit); a power unit; a charge meter unit for detecting electric charge of the power unit in real-time and obtaining an electronic quantity value; and a power control unit for controlling power supply of power consuming components except the CPU, the charge meter unit, and the power control unit; wherein, the power unit is for supplying power directly to the CPU, the charge meter unit, and the power control unit; the CPU comprises: an electric charge value input module for receiving the electricity quantity value transmitted from the charge meter unit; an electric charge range determining module for determining a particular electric charge range the electricity quantity value falls in; a work mode determining module for obtaining a new work mode that corresponds to the particular electric charge range in the power management table when the current work mode does not correspond to the particular electric charge range; a component state determining module for determining the work state changes of the components from the current work mode to the new work mode; and a component state update module for signaling the power control unit to change the work states of the components.