First thing to try is a battery replacement this usually sorts it just remember to heat up the back just before you pry out battery and pry on the side with the volume keys not the logicboard side
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First thing to try is a [https://www.ifixit.com/Guide/iPhone+5+Battery+Replacement/10587|battery replacement]. This usually sorts it. Just remember to heat up the back just before you pry out the [https://www.ifixit.com/iPhone-Parts/iPhone-5-Replacement-Battery/IF118-001-2|battery]. Also, pry on the side with the volume keys, not the logicboard side.
First thing to try is a battery replacement this usually sorts it just remember to heat up the back just before you pry out battery and pry on the side with the volume keys not the logicboard side