Topwell&reg; 2Pcs 3.7V 18650 2500 mAh Li-ion Protected Rechargeable Battery with PCB Protection for 18650 LED Lights Devices 18650 Headlamps Flashlights 18650 Smart Intelligent Automatic Fast Dual/Double-Channel Li-on18650 Rechargeble battery Charger Cord Recharger Charger case USA Plug Sold on Amazon