POWER SUPPLY DEVICE

PROBLEM TO BE SOLVED: To integrate a time for applying a current to a load from an accumulator battery and display the current application integrated time, and to issue an alarm when a voltage is lowered to a prescribed voltage or lower. SOLUTION: This power supply device comprises the accumulator battery 11 that supplies power to the load 16, and a power supply control part 12 that on/off-controls the supply of power to the load 16 from the accumulator battery. The power supply device is also provided with: a voltage measurement part 13 that measures the change of a voltage caused by the current application to the load 16 from the accumulator battery 11; a time integration part 14 that integrates the current application time to the load 16 from the accumulator battery 11; and a display and alarm part 15 that displays the voltage change and the current application integrated time by inputting measurement signals from the voltage measurement part 13 and the time integration part 14, and issues an alarm when the voltage is lowered to the prescribed voltage or lower. By this, the power supply device integrates a time for applying a current to the load 16 from the accumulator battery 11 and displays the current application integrated time, and can issue an alarm when the voltage is lowered to the prescribed voltage or lower. COPYRIGHT: (C)2006,JPO&NCIPI