21700 Cell Holder / Spacer

thingiverse

I printed it with the cheapest PETG I could get my hands on, and it held up surprisingly well. I chose PETG for its flexibility, knowing that I wanted the cells to fit snugly inside the holders. PLA might also work, but I haven't tried it yet. I built a rather large 12s4p pack with them and used a piece of wood to hammer the cell holders against each other on the cells, and they held up pretty well, no signs of cracks anywhere. If you want to build arrays like mine, simply place the individual holders in the array you have in mind. Just arrange them accordingly. I would recommend printing the restrainers so that they touch the build plate first and then use support material to ensure an even print.