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
Another solderless 18650 holder. This is a very useful link with a lot of information about the battery itself… | Solar energy, Renewable energy, Alternative energy
STL file Solderless 18650 battery holder 🔋・3D printing model to download・Cults
DIY 4S2P 100W 21700 Battery Power Bank Holder Detachable Solderless Type C | eBay
Parametric Battery Cell Holder (Fusion 360 Archive Included) by forkineye | Download free STL model | Printables.com