@moses_izumi i mean, i didn't do that, someone else did and i merged their patche. making your own battery packs should be feasible. e.g. a bunch of lipo batteries wired in parallel for amperage. there are probably already solutions for this that you can just buy. generic portable power supplies. for a high power desktop, yeah get a large UPS (that's what i use at home and at the lab)
so long as the voltages match you should be fine