| 摘要 |
A battery charging device is provided to remarkably extend the life time, in case of using as a battery without an adaptor for charging than when using a conventional battery charging device. A power supply unit(10) transforms the input voltage and converts the transformed current into the direct current. A power supply unit has a charging adaptor including a diode(11) converting the alternating current to the direct current, and a trans(13) transforming the voltage. A chargeable battery(20) is charged by being connected to the power supply unit and the power source. A driving part(30) uses the electricity of the chargeable battery. A first transformer(40) drops the negative pole side voltage of the power supply unit by connecting the negative pole of the power supply unit and the negative pole of the chargeable battery. A electric current direction restriction(50) blocks that the charging current of the chargeable battery flows into a first transformer by being connected between of the first transformer and the chargeable battery. A charge indication lamp(60) indicates the state of charge by being connected between of the negative pole and the positive pole. A second transformer(70) is connected between of the power supply unit and the charge indication lamp in order to provide the rated voltage to the charge indication lamp. |
