Not by that much, look at a phone battery soldered to a phone PCB today, it'll fit in most form factors. If there are a couple of different standardized sizes,

Not by that much, look at a phone battery soldered to a phone PCB today, it'll fit in most form factors. If there are a couple of different standardized sizes, it could fit anything, and also allow combinations of multiple. Look at PC monitors: you can attach all kinds of monitors with different resolutions to PC's, and there exist some pretty exotic ones with eye trackers etc... too, and of course also various VR headsets can be connected too.