Patent ID: 7647068

Claim:
A mobile terminal, comprising: a battery configured to provide power to the mobile terminal; a controller configured to receive a power on input signal requesting the mobile terminal be powered on from a power off state, to power on the mobile terminal using a battery voltage from the battery in response to the power on input signal, to execute a booting operation providing power to components included in the mobile terminal, and to detect the battery voltage provided to the mobile terminal; a battery voltage converter configured to convert the battery voltage to a converted battery voltage; a reference voltage converter configured to convert a predetermined reference voltage to a converted reference voltage; and a voltage comparing unit configured to compare the converted battery voltage to the converted reference voltage, said converted reference voltage falling within an operating range of an input terminal of the voltage comparing unit, wherein the controller is further configured to power off the mobile terminal without re-performing the booting operation of the mobile terminal when the voltage comparing unit determines the converted battery voltage is less than the converted reference voltage.