2, lithium 26650 is mainly used to replace the traditional nickel-chromium, nickel-metal hydride batteries, used in the field of mining lamps, flashlights, electric tools, toys, instruments and meters, back power supply of the ups, communication equipment, medical equipment, and military lamps and other fields of the battery.
3, T is the charging port. Need to connect the charger output, one end connects to the T port, one end connects to the ground wire. Charger choose lithium battery 18V or five series charger, charging current 1A.