Patent ID: 8140129

Claim:
A mobile phone terminal with a battery pack containing a rechargeable battery as power supply, and transmitting and receiving radio-signals to and from a mobile phone system base transceiver station, the mobile phone terminal comprising: a data communication terminal communicating data with the battery pack; an intermittent receiving processor periodically carrying out intermittent receiving processing via the base transceiver station when the mobile phone terminal is in a standby operation; and a battery status determining unit transmitting, in response to determining the intermittent receiving processor is carrying out intermittent receiving processing based on a clock signal operation for communicating with the base station, an activating signal to the battery pack via the data communication terminal and reading battery status data from the activated battery pack, wherein the battery status determining unit transmits the activating signal to the battery pack only once every predetermined plural intermittent receiving cycles at the intermittent receiving processor.