1. The interface is unified. Generally, the shape of the battery is the same, and the voltage and current required by electrical appliances are the same.
2. 26650 lithium battery is mainly used to Replace traditional nickel-chromium and nickel-metal hydride batteries are used in batteries of miner's lamps, flashlights, power tools, toys, instruments, power supplies UPS return, communications equipment, medical equipment and military lamps.
3. T is the loading port. You need to connect the output end of the charger, one end to the T interface and the other end to the ground wire. The charger should be an 18V lithium battery or a five-cell series charger with a charging current of 1A.