8pack Kratax High Capacity 3500mWh AA Rechargeable Lithium Batteries with Intelligent Fast Battery Charger--Not applicable to Camera Flashes and AM Radio. Why choose Kratax AA Lithium-ion rechargeable batteries? 1. The battery adopts the exhaust explosion-proof design, liquid-proof, and the safety level is high. 2. 2.5H charging time, than the traditional Ni-MH rechargeable battery saving about half the time. Low self-discharge, is about 0.03% per month, which is less than 1/100 of Ni-MH batteries. The weight is about 19g, is 20% lower than Ni-MH batteries. 3. Low-carbon, green and environmental, it does not contain any toxic and harmful heavy metal elements and substances, such as lead, mercury and cadmium. 4. Multi-protection: Our batteries and chargers have passed ROHS, CE, CQC, PSE etc. certification. Built-in protection device to prevent Overcharge, Overvoltage, Overcurrent, Over Discharge, Short-circuit protection, the charger has reverse charge protection, can protect the battery and charger very good. 5. 3500mWh/2333mAh High capacity, 1600+ cycles, equivalent to 1600 disposable batteries, long lasting. 6. Constant voltage output, full voltage is 1.5V, when discharged with 100mA the voltage is 1.5V constant, when discharged with 500mA, the voltage is 1.3V constant, and so on. The constant voltage can provide stable and strong working power for the equipment. 7. Smart battery charger, USB Type-C charging cable, 5V-3A input, intelligent display to check the charging progress at any time, red light when charging, off when full. 8. The battery charger can intelligently recognize the battery type, wrong battery type can not be charged. Automatic power off after full, ensure the charging safety, effectively extend the battery cycle life 9. Suitable for a variety of high-power electrical devices, including smart home devices, outdoor surveillance systems, wireless cameras, gamecontrollers, toys, remote controls, flashlight, microphones and portable audio players.