Abstract: The invention provides a charging apparatus and an operating method thereof. The charging apparatus includes a power conversion circuit, a feedback circuit, an identifier control circuit, and a low voltage trickle control circuit. The feedback circuit generates a feedback signal for the power conversion circuit, and the power conversion circuit correspondingly adjusts a charging power according to the feedback signal. The power conversion circuit provides the charging power to charge a battery device. The identifier control circuit determines whether to control the feedback circuit to change the feedback signal according to identifier information of the battery device. The low voltage trickle control circuit determines whether to control the feedback circuit to change the feedback signal according to a voltage of the charging power. When the low voltage trickle control circuit controls the feedback circuit to change the feedback signal, the feedback circuit ignores control of the identifier control circuit.

Abstract: The invention provides a charging apparatus and an operating method thereof. The charging apparatus includes a power conversion circuit, a feedback circuit, an identifier control circuit, and a low voltage trickle control circuit. The feedback circuit generates a feedback signal for the power conversion circuit, and the power conversion circuit correspondingly adjusts a charging power according to the feedback signal. The power conversion circuit provides the charging power to charge a battery device. The identifier control circuit determines whether to control the feedback circuit to change the feedback signal according to identifier information of the battery device. The low voltage trickle control circuit determines whether to control the feedback circuit to change the feedback signal according to a voltage of the charging power. When the low voltage trickle control circuit controls the feedback circuit to change the feedback signal, the feedback circuit ignores control of the identifier control circuit.

Abstract: A charging system for charging a battery is disclosed. The charging system includes a first light emitting diode (LED), a second LED, a power conversion module, and a charge control module. The charge-controlling module includes a controlling unit and a comparator electrically connected to the power conversion module. When a voltage of the battery is lower than or equal to a critical voltage, the controlling unit illuminates the first LED. When the voltage of the battery is greater than the critical voltage, the controlling unit illuminates the second LED. When the voltage of the battery is lower than or equal to a regulation voltage, the comparator makes the power conversion module to charge the battery with a constant current, and when the voltage of the battery is greater than the regelation voltage, the controlling unit makes the power conversion module to charge the battery with a constant voltage.