8 X UltraFire 18650 3.7V 4200mah Lithium Rechargeable Battery Red,UltraFire BRC 18650 Li Ion Batteries With Charger From Yaxi2010, $23.12 | DHgate Israel
18650 Lithium Battery 3.7 V Volt 4200mah Brc 18650 Rechargeable Battery Li-ion Lithium Batteries For Power Bank Torch - Rechargeable Batteries - AliExpress
$10.65 (Free or Cheap Shipping) UltraFire BRC 18650 3.7V "4000mAh" Protected Rechargeable Li-ion Batteries (2-Pack) (BRC 18650, "4000mAh"/1800-2000mAh: 2-Pack) at m.FastTech.com - FastTech Mobile
UltraFire BRC 4200mAh 3.7V 18650 Li-ion Battery With PCB(1-Pair)