Verizon forces me if I want battery backup for my ONT to provide 12 D cell batteries.
https://www.verizon.com/support/residential/battery-backup/p...
What a fuckin' joke.
I think a solution to this is mandate providers provide a cellular interface for households for emergency response, with battery backup. Basically a mobile hotspot with a phone jack, speaker, microphone, and red button to call for help attached to a chonky batter pack. Device inventory and health is required to be reported to regulators.
This solves for power, and reporting means it’s trivial to log and audit if the devices are online and available for emergency service calls.
If a mobile tower isn’t available in the area, a tower must be made available for the sector coverage.
Anything else in a world of fiber to the home is compliance theater, as your example shows.
There's some sense in which I prefer this, though, because at least I know how to source D batteries and they're a commonly available standard and I know exactly what their shelf life is. I might even have spares around in my emergency kit for things like lanterns and radios. I've also seen Verizon battery backup units that run on small lead-acid batteries which seem to need frequent replacing, and require me to look up the details and order from a specialty vendor every time... more annoying to keep extras of those on hand and tough luck if it reaches end of life shortly before or during an emergency.