Authentic AWT IMR 18650 3000mAh 3.7V 40A High Drain Flat Top Battery
Amazon.com: 2-Count High-Drain 3.7V Batteries, PAISUE 3600mAh D18L65 Rechargeable Flat Top Battery for Camera, Flashlight, Small Fan, RC Cars with USB Battery Charger : Electronics
18650 Button Top Battery 3500mAh Unprotected Panasonic-Orbtronic-Sanyo