Milwaukee M12 Battery Case

thingiverse

This is a replacement case for Milwaukee M12 battery (3 cells type). It uses an authentic battery cap. The authentic battery case has thin walls where two parts of the case are joined together. Mine cracked in multiple places. **Printing/assembly tips** First, you need to disassemble an original battery to extract cells and the battery cap (the black part of the battery). I used two screwdrivers and a bit of force to do so with ease. Next, print two pieces of the new case. I printed the main case body upside down to minimize the amount of required support material. After printing, clean hooks in the lower part of the main case using an X Acto knife carefully. Next, try to insert an empty main case body into the cap to see if it fits perfectly without any issues. If not, remove it and use an X Acto knife to fix the hooks easily. You can quickly remove the printed case by inserting three small 2x4x25mm rectangular pins into holes in the cap. At this point, you can check how your new battery fits your power tool. When you are comfortable with the fit, remove the main case body from the cap, push cells extracted from the original battery through the case body, close it with a printed base, and then push everything inside the original cap.