1 x 3S1P 11.1V 18650 Holder with Battery Build-in PCM Protection Circuit Module | eBay
RYDBATT Lithium Battery Pack RedarLi-18650-13S3P-46.8V 10.35(9.9)Ah-PCM For Electric Bicycle Battery
Battery holder: Li-Ion 18650 Battery Holder (1S2P) With 2.6" long 20AWG & PCB
2pcs 18650 4 battery holder Case for Li ion batteries holder case 3.7v 18650 1S4P with Build in PCM Protection Circuit Module|battery holder case|4 battery holderbattery holder - AliExpress
$7.77 (Free or Cheap Shipping) 1S4P 18650 3.7V Holder Case Battery Li-Ion PCM Protection Circuit Module (1S4P, 3.7V, 4 x 18650) at m.FastTech.com - FastTech Mobile
$7.77 (Free or Cheap Shipping) 1S4P 18650 3.7V Holder Case Battery Li-Ion PCM Protection Circuit Module (1S4P, 3.7V, 4 x 18650) at m.FastTech.com - FastTech Mobile