Patent ID: 8036717

Claim:
A mobile terminal incorporating a battery pack utilized as power supply, the mobile terminal comprising: a positive terminal connected to a positive electrode of the battery pack; a negative terminal connected to a negative electrode of the battery pack; a data communication terminal communicating with a circuit in the battery pack; a charge control unit controlling charging of the battery pack via the positive terminal; a reference voltage output unit outputting reference voltage; a dividing resistor and a thermistor connected in series between the reference voltage output unit and the negative terminal; a temperature detector detecting temperature based on voltage at a predetermined portion of a series circuit formed of the dividing resistor and the thermistor, and stopping charging of the battery pack with the charge control unit based on the detected temperature; a switching device connected to a portion of the series circuit formed of the dividing resistor and the thermistor, and controlling the voltage at the predetermined portion; and a control unit communicating with the circuit in the battery pack via the data communication terminal, and changing the voltage at the predetermined portion, when abnormality is notified from the battery pack, by controlling the switching device, wherein the switching device is connected in parallel with the thermistor, and the control unit controls the switching device to short-circuit the thermistor to change the voltage at the predetermined portion.