... ; 3. One year warranty; (1) Key Specifications:1. Li-ion 18650 battery, cylindrical rechargeable battery 2. High capacity 3.7V 2600mAh ... power devices, emergency lights, torch etc(2)18650 Battery cell Specification Model 3.7v 18650 -2200mahRated Capacity2200mAhMin.Capacity2150mAhMax Charge Voltage4.2VStandard Discharge ... explosion, tape the battery terminals to insulate them. Li-ion 18650 battery