Battery Type: YCY Li-ion 18500 3.7V 1600mAh Capacity: 1600mAh Voltage: 3.7V Dimensions: 18 * 50mm Battery weight: about 38.0g Protection IC technology parameters: Overcharge protection voltage 4.25V ± 0.05V Over-discharge protection voltage 2.7V ± 0.1V Over-current protection 3.0 ± 1.0A (2.7V ~ 4.25V) Charging method: constant current constant voltage Note: The protective plate according to customer requirements matching parameters Cycle life: after 500 continuous charge and discharge, the battery capacity of not less than 80% of the rated capacity. Product Certification: RoHS, MSDS, UN38.3 like.