Golly. What a fascinating thread. Just wanted to chime in and share my very recent experience with a Lithium-Ion battery powered generator. I think this is a kind of confusing name, and I was happy to see someone mention this technology on page 2 of this thread.
The brand I tried was a Goal Zero, model Yeti 1400. They have other models which use lead acid (car type) batteries which are less expensive. Much heavier, too.Anyway, in my system the beneficial impact of the Yeti was remarkable. I didn't know I had any noise in my system but it reduced the noise floor significantly, allowing microdynamics and nuances and musically important details to come through much more clearly. It was great and, IMHO, was more effective at reducing noise than the very larger Furman 15i or whatever it was I subsequently borrowed from my dealer.
The brand I tried was a Goal Zero, model Yeti 1400. They have other models which use lead acid (car type) batteries which are less expensive. Much heavier, too.Anyway, in my system the beneficial impact of the Yeti was remarkable. I didn't know I had any noise in my system but it reduced the noise floor significantly, allowing microdynamics and nuances and musically important details to come through much more clearly. It was great and, IMHO, was more effective at reducing noise than the very larger Furman 15i or whatever it was I subsequently borrowed from my dealer.