The present disclosure discloses a charging apparatus. The charging apparatus comprises a power source module, a main control circuit, a voltage booster circuit, an adjusting circuit, and an output port. The charging apparatus is configured to charge a vehicle battery or other consumers through the output port. The power source module is electrically connected to the main control circuit and the voltage booster circuit. The main control circuit is electrically connected to the adjusting circuit and the voltage booster circuit. The main control circuit is configured to output an adjusting signal to the adjusting circuit. The adjusting circuit controls the voltage booster circuit to output a first or second output voltage to the output port, according to the adjusting signal. The second output voltage is greater than the first output voltage. The present disclosure provides a plurality of voltages to meet the vehicle battery.