High performance rechargeable battery from Nitecore specially designed for high drain devices like Nitecore TM series and other high-power LED search light and tactical flashlights. Features: Nitecore 18650 3.7V Protected Li-ion rechargeable batteries. Protected: Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V. Capacity: 3400mAh. Voltage: 3.7V. Chemistry: Li-ion. Recharge: up to 500 cycles.