CBJJ Rechargeable 3.7V 21700 Battery 5000mAh Rechargeable Li-ion Batteries for Flashlight 8PC Flat Top

【Wide Compatibility】- Long-lasting rechargeable battery which is compatible with headlamp, flashlights, toys, RC cars, doorbells, speakers, cameras, small fans, etc. Helps you start your devices quickly. 【High Performance】- 3.7v rechargeable battery with large capacity support stable output voltage, effectively prevent damage of the devices, perfect replacement battery for used devices with high frequency. KINDLY NOTE: Overcharge, voltage mismatch, closed indoor environment use and improper battery operation may lead to battery explosion, please use the battery reasonably to eliminate the safety risks. 【Warm Service】- All of batteries have passed strict testing for normal use. If you have any question, please feel free to contact us, we'll reply email ASAP.I