Patent ID: 7444527

Claim:
A circuit for saving power of a battery within an electronic equipment while the electronic equipment is powered off, the circuit comprising: a switch circuit connected to a battery for controlling supply of power from the battery to the electronic equipment; a voltage regulator connected to the switch circuit, the voltage regulator providing regulated voltages; a power management unit coupled to the voltage regulator; a system voltage terminal connected to a node between the voltage regulator and the power management unit via a first diode, the power management unit controlling system voltage; and a first resistor, a second diode and the switch circuit being connected in series; wherein the switch circuit comprises a first transistor, a second resistor, and a power button, the battery is coupled to a first polar of the first transistor, a second polar of the first transistor is coupled to the first resistor, a third polar of the first transistor is connected to the ground via the power button, the second resistor is connected between the third polar of the first transistor and the first polar of the first transistor.