Specification: Tpye of Battery Shockli 26650 5500mah IMR Battery Flat Top Size (mm)26.70.2mm (Diameter)x 65.20.2 mm (Length) Weight (g)952g Nominal Voltage 3.7 V Nominal Capacity 5500mah (1A Discharge) Discharge Cut-off voltage 2.75 VStandard Charge 0.3 A~3A (Recommend 0.5 A~1.5A) /4.2V0.05 V Maximum Charge Current 3AContinuous Discharge Current 20 A Max Discharge Current 30 A Initial Impedance 20m W Cycle Life 1000times: discharging capacit 80% Charging Time Standard charge: 4.5hours (charge current:1.5A) Operating environment Charging, 0C ~ 45 C Discharging, -20C~60 C Application Flashlight Notes: In order to prevent damage to property or injury to yourself, Please read the Warning before using the battery. You must keep the battery away from children & pets. You must charge battery fully before first use, because the volt is low. Dont throw the battery into water or fire. Dont short circuit (+) & (-) terminals with metallic. Dont mix the battery with different capacity or manufacturer. Dont use when the battery wrapper is Damaged, please rewrapped. Dont store the battery in pocket together with metallic such as keys, necklaces. Dont leave, charge battery in car or similar place where temperature may be over 60℃. Package Included:2x Shockli 26650 5500mah IMR battery 1x 26650 plastic Case 1x wrapper