UPS For original BPi

Hope I’ve got the right fourm here.

Has anyone set up a UPS for the Pi? Ideally what I want is not something that plugs in to anything, just an in-line UPS that has USB out and that if the power goes off will keep the Pi running for a bit.

I suppose some of the Rasp Pi ones that plug into the expansion port shut down gracefully and I could use something like that, I’d just need a new case for the mobo.

The thing is, the Pi takes so little power I’d’ve thought that a “dumb” unit would take care of 99% of power cuts.

Many thanks.