The Nitecore NL1836HP is a rechargeable, li-ion, size 18650 battery with a 3600mAh capacity. Built for high-drain devices. 3.6V, with 8A of continuous discharge power. Charge via compatible Nitecore chargers, which include UMS2, UMS4, Ci2 and Ci4. Internal protections against overcharge, overdischarge, short-circuit, and over-temperature.