Description: 3.6V 2600mAh 18650 Flashlight Lithium-ion Battery Product No.: HG1AE1937 Cell model:  BAK18650 / 2600mAh / 3.6V Battery Specification: 1S1P / 2600mAh / 3.6V  Nominal voltage: 3.6V Nominal capacity: 2600mAh Charging voltage: 4.2V Charging current: 520mA Discharge current: 520mA Maximum discharge current: 3A Discharge cut-off voltage: 3.0V Internal resistance : ≤100mΩ Delivery voltage: 3.6-3.9V Battery weight: 50g Product size: 69.2 * 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, overdischarge protection, overcurrent protection, etc. Application field: portable lighting