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Great for LED Flashlights Tenergy's protected 14500 Li-ion battery is perfect for LED flashlights such as these popular Q5 CREE, Olight S15, Nitecore EA11, J5 V1, Fenix LD11, SIPIK SK68, and many more. It gives your flashlights a significant boost in power, making them shine brighter! High Capacity & High Quality Made with top quality Grade A Li-ion cell with high capacity to offer long run time while maintaining high performance, even after repeated use. Advanced Protective Circuit Built-in Japanese smart IC circuit offers sophisticated over-charge, over-discharge, over-current, and short-circuit protection to prolong the battery's lifespan and keep it at maximum performance over time. Reusability Offers Great Savings Tenergy's protected 14500 Li-ion rechargeable battery can be recharged 500 to 1000 times, offering significant cost savings over time. Technical Specifications Battery Size: 14500 Battery Type: Li-ion (Rechargeable) Voltage: 3.7V Capacity: 800mAh Max Continuous Discharge: 1A PCB Protection: Yes Button/Flat Top: Button Top Dimensions: 14.6mm (diameter) x 53.5mm (length) Weight: 21.0g Package Contents: 4 x Tenergy 14500 Li-ion Batteries in Blister Card Warning: These 14500 size batteries are NOT the same as regular AA alkaline batteries, and they are designed specifically for LED flashlights and other Li-ion 3.7V compatible devices. If you are unsure whether your device will work with 14500 Li-ion batteries, please consult with the device's manufacturer.