Summary

I just wanted a simple board for mounting 18650 batteries and the RAK board, so I designed one.

BOM:
The box https://amzn.to/3CRd7Qf
the terminals: https://amzn.to/4fNxA6X
the n connector: https://amzn.to/3VbZdOQ (it's 6 inches long, so i curled it up. if you find a shorter one, like 3 inches go with that)
breather plug: https://amzn.to/418XrBP
The RAK starter kit: https://amzn.to/417yC9v
USB-C 90 deg: https://amzn.to/3ZrkkiH (I leave one of these on the board, for firmware upgrades. avoids having to remove the board)

Here is the antenna that I got, but you will want to make you own design choice based on node location: https://amzn.to/4eM3ks5

P.S. These are affiliate links, they don't cost you anymore to use, but I get a little back for my time and effort I put into this project. So thanks in advance for using them.