ON THE WAY&reg;Rechargeable RED 2Pcs 3.7V 4000mAh BRC18650 Protected li-ion Battery for Flashligh Torch Headlamp Rc toy 100% brand new 2x 18650 3.7V Li-ion 4000mAh rechargeable batteries 100% QC of every battery Recharge: up to 1000 cycles With Re/Discharging protection circuit Low reoccuring operration cost,Environmental friendly