3S 12v 18650 battery

thingiverse

Human uses 10mm wide nickel-plated strip for contacts. Print two of them - top and bottom. Zipties hold the entire thing together, and 3mm wide ones work fine. If anyone could space the cells equally, it would be great as I'm too inexperienced with Sketchup to do it myself. //Edit: Fixed the holes up a bit, my cells were slightly too tight due to the isolation. Sorry!