Power Tool Battery Pack PS

Something I would love to see: some kind of means to power a mini-rack from power tool battery packs. (I've seen adapters for things like portable soldering irons.)

I'm a Makita-guy and so have half a dozen or so of their battery packs. But it should be easy enough to make variations to support other systems (Milwaukee, Dewalt, etc.).

- 5V USB (PoE?) outlets
- perhaps 9V or 12V for switches or whatever that have non-5V requirements
- holds at least 2 battery packs so they can be hot-swapped (supplying power in parallel)
- perhaps 2U if on a rack shelf (I haven't measured though if that would work)

I don't expect anyone has come across such a thing. Might have to make it from scratch.

No files, tests, or entry points are mentioned. Start by resolving the proposed battery systems, output voltages, parallel hot-swapping, and rack size; done would require an agreed design and a working implementation meeting those requirements.

Written by the indexing model from the issue text.