26650 Battery Size65*26*26mm(2.56*1.02*1.02inch) It's a rechargeable battery FLAT TOP.Please confirm whether your device is suitable before purchasing Multi-ApplicationLong lasting 26650 batteries for headlamps, flashlights, doorbells,alarm clock,toys and other necessary devices.Wake up your device at any time High PerformanceWith a large capacity of 8800mAh, 26650 rechargeable batteries can last at least 20% longer than other batteries, ideal replacement battery for used devices with high frequency Safety ProtectionPovides 6 types of protection, such as temperature protection, short circuit protection, overcharge protection to stabilize the battery Low Self-Discharge Battery26650 battery can still maintain 80% capacity after 2 years of non-use, which can maintain the lasting performance of the battery itself and reduce the probability of battery damage