18650 2200 Li-ion 3.7 Volt With PCB (Flat Top) Battery
Amazon.com: Tokeyla18650 Rechargeable Battery 3500mAh Using The 18650 Flat Top Batteries Charger (Does not Include The 18650 Battery Charger) 18650 Rechargeable Batteries 3.7V Li-ion Batteries 18650 : Electronics
18650 Green Lithium-Ion Rechargeable Battery | xUmp