6x 18650 5000mah Li-ion Rechargeable Battery for Ultrafire LED Flashlight Torch 6 PCS GOOD 18650 3.7V 5000mAh Li-ion Rechargeable Battery Low discharge rate, no memory effect Over charge and discharge protectin - Short-circuit and over current protection & Environment friendly - Widely used on torch, laser pointer, as emergency lighting and other portable devices