Amazon.com: IMREN 18500 Rechargeable li-ion Battery 3.7V 1200mAh with Button Top (4PCS) : Health & Household
Cylindrical li ion battery 18650 3.7V 2000mAh rechargeable battery pack - VATS BATTERY
Tenergy 14500 Unprotected Li-Ion Flat Top Battery
EBL 4-Pack 3.7V 2800mAh CR123A 16340 Rechargeable Batteries for Torch Camera Flashlight - Walmart.com
Lithium Ion Polymer Battery with Short Cable - 3.7V 350mAh : ID 4237 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Lithium Ion Polymer Battery - 3.7v 500mAh : ID 1578 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: ICR18500 Battery 3.7V 1400mah Li-Ion Rechargeable with Flat Top 6PC(They are not 1865mm Batteries Also Not AA Size Battery) : Health & Household
Lithium Ion Polymer Battery - 3.7v 100mAh : ID 1570 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits