@brandon I've been eyeing one of these removable cell packs. Having a whole bunch of cells to swap in and out would feel so satisfying. I don't think I've seen any with a high enough output/capacity yet though. https://www.aliexpress.com/item/1005009572944530.html
@mauve No, that would be nice, but I don't really believe in a UPS. Every bit of complexity you add just degrades reliability. Same thing with RAID. I just shut down between power supply swaps.