REVERSE CHARGING SYSTEM AND METHOD, AND RELATED APPARATUS

Embodiments of this application provide a reverse charging system and method, and a related apparatus. The charging system includes a first electronic device and a second electronic device. The first electronic device is configured to boost a first battery voltage of the first electronic device to a first voltage value, and then use the first voltage value to perform reverse charging on the second electronic device. The second electronic device is configured to adjust the first voltage value to a second battery voltage of the second electronic device, and use the second battery voltage to implement charging. The first battery voltage of the first electronic device decreases as power supply duration of the first electronic device increases, and the second battery voltage of the second electronic device increases as charging duration of the second electronic device increases. In this way, the second electronic device can use a voltage suitable for a second battery to charge the battery of the second electronic device, improving reverse charging efficiency.