4pcs 4000mah Rechargeable 18650 Battery for Headlamp Headlight Flashlight Latest Boruit 4x Rechargeable 3.7V Li-ion 4000mAh 18650 Battery For Flashlight Headlamp Lithium-ion Rechargerable Replacement Battery No Memory Effect, Recharge up to 1000 Cycles Low Reoccuring Operation Cost, Short-circuit and Over Current Protection Suit for Camera, Watch, Flashlight,Headlamp and other lamps