Brand new 3.7V 2400mAh rechargeable Lithium Ion battery. Suitable for Xenon and LED flashlight. High capacity rechargeable battery with low price. No memory effect. Long lasting power for your flashlight. Suggested to use with UltraFire intelligent charger (WF-139). DETAILS: Model - 18650 Weight - 46g Size - 65mm x 18mm (diameter) Rechargeable time - 600-800 times Capacity - 2400mAh Output voltage - 3.7V Note: We are not responsible for any damage that caused by the misuse of the battery.