Think about it. In this case a scheduled power outage, but some are
unplanned.

The smoke alarms start beeping, there are three small children in the house,
and not a single line-powered phone to dial 9-1-1.

Hot pipe with no thermostatic fan switch was outgassing. Kids were fine,
treated mom for hyperventilation.

Have to wonder how many of us are so gadgeted that we don't have a
line-powered phone, though. Good thing she finally found her cell phone in
the dark.