Related question: does anyone know of an usb-c powerbank that can be effectively used as UPS? That is to say is able to be charged while maintaining power to load (obviously with rate of charge greater by a few watts than load).
Most models I find reuse the most powerful usb-c port as ... recharging port so unusable as DC UPS.
Context: my home server is my old https://frame.work motherboard running proxmox VE with 64GB RAM and 4 TB NVME, powered by usb-c and drawing ... 2 Watt at idle.
This isn't a power bank, but the EcoFlow River makes for a great mobile battery pack for many uses (like camping, road trips, etc) but also qualifies for a UPS (which means it has to be able to switch over to battery power with certain milliseconds.. that part i'm not sure, but the professional UPSs switch over in < 10ms. I think EcoFlow is < 30ms but I'm not 100% sure).
I've had the River Pro for a few months and it's worked perfectly for that use case. And UnRaid supports it as of a couple months ago.
Powerbank is a wrong keyword here, what you want to look for is something like “USB-C power supply with battery”, “USB-C uninterruptible power supply”, etc.
Lots of results on Ali for a query “usb-c ups battery”.
The battery will eventually degrade, so how about using a portable power station with replaceable 18650 cells? Essentially a powerbank with replaceable 18650 cells. They're a bit bulky but you can replace the degraded cells as needed.
Most models I find reuse the most powerful usb-c port as ... recharging port so unusable as DC UPS.
Context: my home server is my old https://frame.work motherboard running proxmox VE with 64GB RAM and 4 TB NVME, powered by usb-c and drawing ... 2 Watt at idle.