Amazon.com: JESSPOW 18500 Battery, IMR 18500 Rechargeable Li-ion Battery 1600mAh 3.7V for Flashlight, Solar Garden Light and More, 18500 Rechargeable Solar Batteries with Button Top (8 Pack) : Health & Household
Test / Review: UltraFire BRC18650 4000 mAh (Brown-Gold) - Rechargeable Batteries - BudgetLightForum.com
UltraFire 3400mAh 3.7V 18650 USB Rechargeable Lithium Battery with Pro