1)3.7V 18650 li-ion battery, with safe protection circuit
2)used for led torch,and games,toys
3) charge limit voltage 4.2V and discharge limit voltage 2.75V
4)Eco-friendly,No memory effect
5)Other size: 14500,14250,18650,18500,17500,17335,10430,22430,22650,26430,26650