Detailed Product Description Li-ion Battery is the popular battery in recent years, take advantages of light weight, small volume ... , tracking system, and test machine. Characteristics:1,Nominal voltage: 3.7 V; Working voltage: 2.75~4.2 V. 2,Highest ... , Pb are not contained. 6,Light weight and small volume 7,Over voltage/lacking voltage protection are needed, and the voltage ...