Basic 18650 Battery Holder

Made to fit contacts I got from Amazon: https://www.amazon.com/gp/product/B0B1ZJ8PNH/

It's made completely symmetrical so you can place the spring on either side and it'll fit properly.

Printing Note: The first version I made of this was too tight and it would flex when a battery was inserted. I increased the tolerances a bit to make it less snug and printed it with 6 walls to combat the flexing.