Description: 3.6V 2900mAh 18650 Flashlight Lithium-ion Battery Product No.: HG1AE3933 Cell model:  18650 / 2900mAh / 3.6V Battery Specification: 2900mAH / 3.6V  Nominal voltage: 3.6V Nominal capacity: 2900mAh Charging voltage: 4.2V Charging current: 580mA Discharge current: 580mA Maximum discharge current: 3A Discharge cut-off voltage: 2.75V Internal resistance : ≤ 80m Ω Delivery voltage: 3.7-4.0V Battery weight: 45g Product size: length 69.2 * diameter 18.75mm (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, over discharge protection, over current protection, etc Application field: portable hand-held lighting equipment