3x 18650 cells spot welding tool

This is a very simple tool, but also very handy, so I decided to share it.

It fits 3 cells of 18650 size and squishes them together to waste as little space as possible. I've used it for spot welding tens of them and it helped me save a lot of time.

Also adding a piece that helps with wiring - use it as a “plug” when heat-shrinking the battery pack.