/diy/ - Do It Yourself

>>2582668
It's all screwed in and friction fit, such that it can be completely disassembled again in seconds. There is just some hot glue near the knot in the power leads to help with strain relief. Pic related ebay pack is 2s when I needed 1s, and was way too big vs. what I needed. And I wanted an excuse to learn freeCAD. And unless I built it myself I'm concerned re: chinese 18650 battery packs; a friend of mine lost 3 rooms of his house due to an airsoft gun battery fire.
From this project I see why 18650s aren't commonly swappable in mass market; putting them in the wrong way could short them and cause a fire. It was also interesting to see how many details and dimensions needed to be considered for something as simple as this "box".