Brand SingFire Color Green + white Material Li-ion Quantity 4 Type Lithium Ion Model 18650 Mark Capacity 2400 Actual Capacity 2200 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 Can be applied to need to use 3.7 V voltage of a torch or other lighting equipment Other Features SingFire18650 rechargeable lithium battery is equipped with a protection circuit board can prevent the battery overcharge discharge overload short circuit use safer longer life. he charge number is as high as 500 times high recycling times more environmentally friendly. Packing List 4 x SingFire BRC 18650 battery