| 摘要 |
PROBLEM TO BE SOLVED: To prevent mail transmission from being impossible and not to use a battery capacity uselessly by controlling an electronic mail not to be sent when the residual capacity of a battery is a discrimination reference value or less. SOLUTION: A battery control microcomputer 206 which receives a request from a CPU discriminates an operation power source and notifies the result to the CPU. The CPU requests the microcomputer 206 to measure the residual capacity of a battery when the result is the battery. The microcomputer 206 makes a battery voltage measuring part 203 measure voltage of the battery. The part 203 notifies measured voltage of the battery to the microcomputer 206. The microcomputer 206 calculates battery residual capacity from the relation of the voltage, battery residual capacity stored in a ROM 210 and battery voltage and notifies a calculation result of the battery residual capacity to the CPU. The CPU suspends transmission of a mail and shows the effect on a displaying part when the residual capacity is below fixed capacity. |
