Product name: 3.7V 18650 9900mAh Li-ion Rechargeable Battery for Flashlight Features: Rechargeable battery. Recharging/ Discharging protection circuit. No memory effect. Low reccuring operation cost. Safe and environmental friendly. Short-circuit and over-current protection. Description: Keep in a dry and cool place. Sheef-life around 10 years. Charges up to 500 times for an economical and responsible way to keep your battery-powered devices working Specifications: Color: black & green Size: 66*18mm Capacity: 9900mAh Voltage: 3.7V Battery type: Li-ion Quantity type: 2pcs, 4pcs Warning: The voltage of full charge and cut off discharge is 4.2V and 2.75V. Don't heat, incinerate or reverse polarity. Package Included: 3.7V 18650 9900mAh Li-ion Rechargeable Battery Ready stock - Fast Delivery