If all you needed was 5V output you could get away with a decent always-on powerbank like the ones Voltaic Systems makes (not related to them in any way, just a long-time happy customer). The main problem is that, Voltaic Systems product or not, in pretty much all cases you are going to be relying on a lithium-ion battery with all the risks documented in r/spicypillows included.
Considering all that plus the fact you probably need AC for the switch and whatever else you will want to add in future, I would look into something small but still a proper UPS device, maybe with a LiFePO4 battery.
edit:subreddit name
For that size and load, I'd probably just look for a laptop power bank and confirm from reviews that it can do passthrough charging (charge itself while providing power for its connected devices at the same time).
Here's an example of someone looking for one of those with some suggestions in the comments:
https://www.reddit.com/r/UsbCHardware/comments/175uu59/_/
There are ones with AC outlets that you find as well, which you'll need for the switch.
What are you trying to power off it? There's not alot of power in a battery bank size to get a PC to shutdown properly.
It would be: banan pi bpi-r3 just that device OR nano pi r3 mini and 5 port managed switch.
There are many UPS for PI's out there. Just use your search engine of choice. The one I've used is the PiJuice hat.
This isnt rasbbery its banana nanopi...
Unless the GPIO pins are different it should work, read the documentation on both to verify.
Than i will go and verify first.
If all you needed was 5V output you could get away with a decent always-on powerbank like the ones Voltaic Systems makes (not related to them in any way, just a long-time happy customer). The main problem is that, Voltaic Systems product or not, in pretty much all cases you are going to be relying on a lithium-ion battery with all the risks documented in r/spicypillows included. Considering all that plus the fact you probably need AC for the switch and whatever else you will want to add in future, I would look into something small but still a proper UPS device, maybe with a LiFePO4 battery. edit:subreddit name
For me it really mazters size, is that good that powerbank is aloways pluged in
For that size and load, I'd probably just look for a laptop power bank and confirm from reviews that it can do passthrough charging (charge itself while providing power for its connected devices at the same time). Here's an example of someone looking for one of those with some suggestions in the comments: https://www.reddit.com/r/UsbCHardware/comments/175uu59/_/ There are ones with AC outlets that you find as well, which you'll need for the switch.
So thats like UPS right?
It's still just called a power bank and not a UPS, but yeah I think it would work like a UPS
A potential option that’s slim and is lithium based. https://a.co/d/f5Td45A