Brand SingFire Color Green + White Material Lithium Quantity 4 Type Lithium Ion Model 18650 Mark Capacity 2400mAh Actual Capacity 2200mAh 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 Yes Application LED flashlight or other device needing 3.7V power Other Features The SingFire 18650 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 18mm (+/- 1mm); 2 x AA / 26650 / 18650 / 17670 / 14500 / 16340 universal charger with LED charging indicator: Charging-RED Full Charged-GREEN Packing List 4 x SingFire BRC 18650 batteries 1 x1 8650 charger (Input: AC 100~240V 50~60Hz; Output: DC 4.2V 600mAh; 2-flat-pin plug)