Amazon.com: ICR18500 Rechargeable Li-Ion Batteries 3.7V 1400mah with Flat Top for Flashlight,Solar Garden Light(4pc)(They are Not AA,AAA Size Batteries) : Health & Household
Ultrafire 100% Brand New Original 18650 Battery 2200mah 3.7v Lithium Ion Rechargeable Battery For Flashlight Toy Battery - Portable Lighting Accessories - AliExpress
3.2V 1500mAh Li-FePO4 18650 Rechargeable FLAT TOP Battery For Solar Lights