ELECTRONIC APPARATUS HAVING CHARGING FUNCTION

An object of the present invention is to provide an electronic appliance equippedwith a charging function, in which a rechargeable battery is not discharged even when the electronic appliance is operated during charge operation. When an external power supply is connected to an external power supply input terminal 2 of the electronic appliance, a charge current flows through a diode 3, a switch means 4, and a current detecting means 5 into the rechargeable battery so as to charge the rechargeable battery. While a control means 8 monitors the charge current, when the rechargeable battery 1 is brought into a full charge state and the charge current becomes lower than, or equal to a predetermined value, the control means 8 turns OFF the switch means 4 . When the switch means 4 is turned OFF, since the external power supply is electrically separated from the rechargeable battery 1, discharging operation of the rechargeable battery is blocked. Subsequently, in the case that the external power supply is connected, since the above-described external power supply voltage is supplied via a regulator 6 to a load 7 and the control means 8, the rechargeable battery is not discharged also in this case, but a full charge state is maintained.