Mobile phone terminal and charging system

摘要

Disclosed is a mobile terminal (1) incorporating a battery pack (4) utilized as power supply. The mobile terminal includes a positive terminal (31b) connected to a battery pack positive electrode (31a), a negative terminal (33b) connected to a battery pack negative electrode (33a), a data communication terminal (35b) communicating with a circuit in the battery pack, a charge control unit (103) controlling charging of the battery pack via the positive terminal, and a reference voltage output unit (101) outputting reference voltage. The terminal further includes a dividing resistor (104) and a thermistor (107) connected in series between the reference voltage output unit and the negative terminal, a temperature detector (100) detecting temperature, and stopping charging of the battery pack based on the detected temperature, and a switching device (16) controlling the voltage at the predetermined portion. The terminal still further includes a control unit (11) communicating with the circuit in the battery pack via the data communication terminal, and changing the voltage at the predetermined portion when notified abnormality from the battery pack.