Patent ID: 7605567

Claim:
A battery protecting circuit being configured to control a battery to power a system, the protecting circuit comprising: a control circuit adapted for being connected between the battery and the system; and a sensing circuit including a tri-axial accelerometer having X-axis, Y-axis and Z-axis, the tri-axial accelerometer being capable of detecting position changes of the battery and outputting through the X, Y and Z axes voltages that correspond to the position changes, the sensing circuit ultimately outputting a controlling voltage to the control circuit according to the voltages outputted by the X, Y and Z axes, when the battery is in an unstable state, the controlling voltage outputted by the sensing circuit makes the control circuit OFF and the battery cannot power the system; when the battery is in a stable state, the controlling voltage outputted by the sensing circuit makes the control circuit ON and the battery supplies power to the system.