... Use the safety, no pollution, no memory lithium-ion battery, and the capacity is up to 2400mAH; KM-171 head lampProduct ... Use the safety, no pollution, no memory lithium-ion battery, and the capacity is up to 2400mAH;2. lithium-ion ... cycles like this .Cautions:For service life of the battery, when the ray of the head light is becoming ... operations, head lamp use 1W high power LED and li-ion battery