Are you looking for rechargeable batteries? Here we recommend you this UltraFire battery. Higher energy density and lower weight than other types rechargeable batteries. The advantage of this UltraFire battery is that protected rechargeable battery features a button top making. UltraFire portable rechargeable battery is particularly compatible with many flashlights. And this UltraFire battery is a very economical way to lower the operating costs of lithium-powered flashlights. This 18650 rechargeable battery simplifies usage with its integrated PCB. Great and useful rechargeable battery that you can't miss it.