| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic device capable of accurately estimating the degree of degradation of an internal power supply.SOLUTION: When a constant-current charge is performed on an internal power supply 24 by a charging circuit 25, an estimation circuit 27 of an electronic device 1 has a control unit 22 control each functional unit in the same state as an initial state upon factory shipment, etc., where the control unit 22 controls each functional unit so that a load current Iload discharged from the internal power supply 24 is constant. In this way, a state is formed in which the load current Iload discharged from the internal power supply is constant. Then, an increment &Dgr;V of a voltage V of the internal power supply 24 detected by a voltage detection circuit 26 during a prescribed time &Dgr;t is calculated in this state, and the calculated increment &Dgr;V of the voltage V and an increment &Dgr;Vof the voltage V of the internal power supply 24 in a pre-recorded initial state are compared to estimate the degree of degradation of the internal power supply 24. |
