Brand SingFire Color White+Green Material Lithium Quantity 2 Type Lithium Ion Model 26650 Mark Capacity 5000mAh Actual Capacity 4000mAh Battery Voltage 3.7 V Rechargeable Yes Rechargeable Times 500 Buitl-in Protected Circuit Yes Over Voltage Protection Yes Short-circuit Protection Yes Over-charging Protection Yes Over-discharging Protection Yes Mercury Free No Application Suitable for flashlight and other electronic products; The SingFire BRC 3.7V 26650 rechargeable Lithium battery is equipped with a protection circuit board (PCB) on the negative pole. The PCB can protect the battery from overcharge over-discharging overload and short circuit which can make the battery safer and longer lifespan. The battery is environment friendly and perfect for super bright flash and other devices; Size: 69 x 26mm (+/- 1mm) Other Features High capacity rechargeable battery; With circuit Packing List 2 x 26650 batteries