4-Cell Battery Holder used for 18650 cells – Higherwire
Wholesale Custom DIY 1 2 4 slot Plastic Cylinder Battery Holder Parallel for 18650 26650 li ion cells with wire and switch From m.alibaba.com
Amazon.com: 4S 18650 Battery Holder Case Box for 4X 18650 15V Li-Ion with 6" Wire Leads by Envistia Mall : Electronics
Amazon.com: 18650 Battery Case Holder, 3 Pcs 4 Slots x 3.7V 14.8 Volt DIY Battery Storage Box, in Parallel Black Plastic Batteries Case for 4 x 18650 Ltvystore : Electronics