Definitely a product I've been thinking about... Lead-acid based UPC products have lingered on way too long into the lithium battery age.
I had a lead-acid based UPS which I plugged one DSL modem and my cordless telephone base station into the wall which would give me 3 days of modern communications into a power outage, which happens quite frequently in my location. Once my DSL got upgraded to fiber-to-the-node (with a 10x speed increase) my DSL would quit working when the power went out at the node so the UPS wasn't quite worth using anymore.
I had a lead-acid based UPS which I plugged one DSL modem and my cordless telephone base station into the wall which would give me 3 days of modern communications into a power outage, which happens quite frequently in my location. Once my DSL got upgraded to fiber-to-the-node (with a 10x speed increase) my DSL would quit working when the power went out at the node so the UPS wasn't quite worth using anymore.