A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.