... the safety, no pollution, no memory lithium-ion battery, and the capacity is up to 2400mAH; ... safety, no pollution, no memory lithium-ion battery, and the capacity is up to 2400mAH;2 ... ion battery built-in overcharge & over discharge protection circuit; long life, can be used circularly 1000 times above;3. With 1W high ... this .Cautions:For service life of the battery, when the ray of the head light ...