18650 Battery Holder box case 3.7V Box multi choice 1 2 3 4 cell | eBay
4*10 18650 Battery Holder ( Integrated, Not Stitching) Used For 4p10s 36v 10ah Li-ion Battery Pack Electric Bike Battery Bracket - Tool Parts - AliExpress
Battery holder: Li-Ion 18650 Battery Holder (1S4P) With 2.6" long 20AWG & PCB (1S4P-18650)
2 x 18650 Battery Holder - 7.4V Battery Pack - BC Robotics