Battery performance, iPhone switch off to 30%
My iPhone 4S Battery has 458 cycles of charge, iOS is update to 9.0.2
I have a problem about battery performance, the battery level decrease very fast during the day and when the percentage arrive at 30% more or less, the battery level decrease is very fast and in few minutes iPhone shut down.
When I connect the dock connector to power charge the battery recharges very quickly ..
.. What You think..
Is this a good question?