UltraFire BRC 18650 4000mAh 3.7V Li-ion With PCB Battery (2-pack)
UltraFire Rechargeable 18650 Li-Ion Battery - The Home Security Superstore
Amazon.com: ZWPO 4Pcs 18650 Rechargeable Battery Lithium 3.7V 4000Mah Li-ion Rechargeable Battery Large Capacity 18650 Rechargeable Batteries Button Top Battery for LED Flashlight Torch : Health & Household
Amazon.com: JOSLEB aa Lithium batteries3.7 Lithium Ion Battery 4000mAh Large Capacity Battery Button Top Battery for LED Flashlight Head Torch Doorbells 10 Pack : Health & Household