UltraFire BRC 18650 4000mAh 3.7V Li-ion With PCB Battery (2-pack)
Amazon.com: 18650 Rechargeable Battery 3.7 Volt 4000mAh Large Capacity Lithium Batteries Sa-fe Accessories for LED Flashlight, Emergency Lighting, Electronic Devices etc. 4 pcs (Button Top) : Health & Household
Amazon.com: 18650 Rechargeable Battery 3.7 Volt 4000mAh Large Capacity Lithium Batteries Sa-fe Accessories for LED Flashlight, Emergency Lighting, Electronic Devices etc. 4 pcs (Button Top) : Health & Household