iPhone 4s turned off at 20 percent Battery Life?

rtgc2003

Member
Bronze
Oct 9, 2007
105
5
18
DFW,TX
#1
Don't know why it turned off at 20 percent was going to update a app and then it shut off. First time this has happen im on iOS 5.0. Had to connect it to charge and it booted up fast and still had 16 percent battery left. Has anybody had this happen to them before?
 
Oct 3, 2009
986
31
48
#2
Nope. Used to run mine down to sub 10% daily. Wouldn't shut off till there was no power.
 

Europa

Moderator
Senior Moderator
Dec 12, 2008
28,417
5,544
113
Utah
#3
Sounds like a battery calibration problem. The power down may have calibrated it. Try a hard reset of it does it again. Press the home and power buttons at the same time. Ignore the slide to power off and let go when you see the Apple logo.