Is there no backup power for cell towers in case of a power outtage?

hellschicken

    Yesterday, power in our area was out from about 2pm to 2am.  My signal dropped from the usual 2-3 bars of LTE I have at my house to 1 bar of 4g.  I had voice service, but no data service.  Friends on AT&T had full data service.

     

    Around 9:30pm, I got back my 3 bars of LTE with full data service.  The power was still out at my house, but it almost seemed like that just happened when the power company happened to restore power at my local cell tower.

     

    Does T-Mobile not have backup power at most of their towers?

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