... Treatment by paint rubber, Cell Type is lithium battery,Capacity is 1900mAh.feature:1.Power Switch:ON/ ... that case it is charging.When the lithium battery is dead,pls insert USB cable into it ... device,thereby reducing charging efficienecy and life of battery.do not put it in the fire and heating source ... not leave it directly in the sun or rain;aviod colliding.4.take it carefully to avoid dropping. battery ...