You can connect high-power diodes to step down the voltage. Search for "high-power buck diode" on Taobao, and you can find options like "up to 1.2V buck," which cost a few dollars. 13.8V ±15% is equivalent to 11.73V - 15.87V, and 16.8V - 1.2V = 15.6V. When the voltage drops below 13.8V, manually disconnect the connected high-power diode. If you want a stable 13.8V, use a DC-DC regulator, which is more expensive.
闽ICP备2021006864号-7
闽公网安备35020602002794号