20pcs/lot Plastic 18650 Battery Holder Bracket Cylindrical 18650 Case Cell Holder Safety Anti Vibration Li-ion Battery Holder - AliExpress
Battery Holder Case Box with 6" Wire Leads for 1S 18650 Li-Ion Battery – Envistia Mall
Amazon.com: Ltvystore 18650 Battery Case Holder, 5 Pack 3 Slots x 3.7V DIY Battery Storage Box, in Parallel Black Plastic Batteries Case with Pin for 3 x 18650 : Electronics
Dual 18650 Battery Holder with Power Switch - Canada