vxo on Nostr: how long do the cellular networks stay up where you are when power fails? Recently ...

how long do the cellular networks stay up where you are when power fails? Recently I've seen kind of a mix - some places there are actually batteries and generators that work, but others, you either wind up with towers working but their backhaul goes down immediately, or they just drop off air within seconds to hours.

Telecom backup power seems to be a completely forgotten feature