Description: 3.6V 2550mAh 18650 With USB Flashlight Lithium Battery Product No.: HG1AE7810 Cell model:  18650 / 3.6V / 2550mAh Battery Specification: 1S1P / 3.6V / 2550mAh Nominal voltage: 3.6V Nominal capacity:  2550mAh Charging voltage:  4.2V Charging current: 1275mA Discharge current: 1275mA Maximum discharge current: 7A Discharge cut-off voltage: 2.75V Internal resistance : ≤ 75m Ω Delivery voltage: 3.6-4.0V Battery weight: 50g Product size: ∮18.75*70.2mm(Max) Operating temperature: Charging temperature: 0-45°C; Discharge temperature: -20-60°C Storage temperature environment: 1month - 20-60 ° C; 3months - 20-45 ° C; 12months - 20-25 ° C Relative humidity: 65 ± 20% Battery structure: 1S1P Lithium Battery protection: short circuit protection, overcharge protection, overdischarge protection, overcurrent protection, etc. Application field: Flashlight, portable lighting, Taticle Flashlight powered by Lithium-ion Battery