IPhone 5 shuts down at 30% power

My iPhone 5 has recently started shutting down when it reaches 30% power on the indicator. If I power it back up it will show just less than 30% and work for a few minutes longer, but then shut down again. Another power up will then show a depleted battery. I've had this phone nearly two years and it's just begun to do this. I found a thread from 2013 that had a variety of "fixes" but none that seemed to work. I'm running OS7.0 and do not wish to upgrade, as I've had friends who upgraded and lost everything. Other than replacing the phone at full price (not really an option), any suggestions?

jigzmom wrote:
My iPhone 5 has recently started shutting down when it reaches 30% power on the indicator. If I power it back up it will show just less than 30% and work for a few minutes longer, but then shut down again. Another power up will then show a depleted battery. I've had this phone nearly two years and it's just begun to do this. I found a thread from 2013 that had a variety of "fixes" but none that seemed to work. I'm running OS7.0 and do not wish to upgrade, as I've had friends who upgraded and lost everything. Other than replacing the phone at full price (not really an option), any suggestions?
You don't lose data if you backup your phone on a regular basis.  You should be doing the same thing also.
Google on how to recalibrate your iphone battery.

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