Patent ID: 8437809

Claim:
A mobile communication terminal, comprising: a first wireless communication unit corresponding to a first wireless communication system; an interface capable of detachably connecting an external apparatus; a determination unit for determining whether the external apparatus connected to the interface corresponds to a second wireless communication system and is a second wireless communication unit that consumes less power than the first wireless communication unit; a battery voltage detection unit for detecting battery voltage of a power supply unit containing a battery; and a control unit for controlling the first wireless communication unit to be in a disabled state when the first wireless communication unit is communicating and the battery voltage detected by the battery voltage detection unit is equal to or less than a first predetermined value, in a case where the determination unit determines that the second wireless communication unit is connected, wherein when the battery voltage is determined to be equal to or less than a second predetermined value, the control unit notifies a user of termination of standby of the first wireless communication unit, and wherein when the battery voltage is thereafter determined to be not equal to or less than the second predetermined value the control unit restarts standby of the first wireless communication unit.