Quad 18650 Cubic Battery Case

thingiverse

I'm designing a Quad 18650 battery case that features an elongated cubic design with clever side cutouts. The top and bottom have recessed details, but be warned: printing this design can be tricky and requires careful support. The fit is incredibly snug, both in width and height. I've had great results using my Samsung 25R batteries - they slide in like a perfect fit. If you need a larger size, try increasing the scaling in your slicer by a few percent. The top simply snaps on, and its tight seal helps keep the batteries securely in place. However, if you push hard enough, it will eventually pop out. With use, this may become even more pronounced as the snap loses its initial snugness. Fortunately, popping the top off is a breeze with your fingernail.