Description: 21700 3.6V 5000mAh flashlight Li-ion battery Product No.: HG1AE5935 Cell model: 21700/5000mAh/3.6V Battery Specification: 1S1P/5000mAh/3.6V Nominal voltage: 3.6V Nominal capacity: 5000mAh Charging voltage: 4.2V Charging current: 2500mA Discharge current: 2500mA Maximum discharge current: 20A Discharge cut-off voltage: 2.75V Internal resistance : ≤ 80m Ω Delivery voltage: 3.5-4.0V Battery weight: 65g Product size: 76* 21.75mm (max) Operating temperature: Charging temperature: 0-45°C; Discharge temperature: -20-60°C Storage temperature 1month - 20-60 ° C;  environment: 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: Outdoor lighting, flashlight