18650 Battery holder

I designed this up to hold 21 18650 batteries and a BMS board all in the form factor of a 9AH 12v APC battery. The "Bottom 2" STL has a larger fillet on one corner on the very bottom to better accommodate being installed into an ammo can radio I made. Similar items to this are out on the market but I found my design is better then those and I can just print out another one in 24 hr or so instead of waiting 3 months for delivery from China. If you use this you will still need the spacers. I assemble my battery packs so they are 12.6v 17.5AH batteries. for the terminals I just soldered some 1/4" connectors to the wires from the battery pack and then epoxied them into place through the appropriate slots. only use if you fully understand the concept of assembling 18650 battery packs, I do not hold any responsibility for any failures. If you have any questions, please comment below and ill try to get with them asap.