Where I live was caught up in the SF bay area storms at the beginning of the year, and we had several extended multi-day power outages. It quickly became appare

Where I live was caught up in the SF bay area storms at the beginning of the year, and we had several extended multi-day power outages. It quickly became apparent that the battery backup in the local cell tower lasts about an hour, and then it's just gone. It was very worrying.