iPhone 4 battery won't charge to 100%

Discussion in 'iPhone Tips, Help and Troubleshooting' started by urbancity, Aug 6, 2010.

  1. urbancity macrumors member

    Mar 18, 2009
    Hi guys,

    I have a four day old iPhone 4. I've noticed that even if I charge my iPhone overnight (typically from 11-6:30am), the battery indicator does not reach 100%. It reads 93-94%.

    Is this normal, and if not how should I charge my phone such that it's fully charged?
  2. iHeartapple2 macrumors 6502


    Jun 29, 2010
    Turn off the phone and then turn it back on after a full charge. It should display 100% then. I have this problem every now and then.
  3. iPhoneGweek macrumors newbie

    Apr 30, 2012
    The problem is not the battery it's the percentage meter it is not working I had the same problem Go to settings->General->usage->Battery percentage turn it off then on reset your iPhone while it's on by pressing home and power at the lock screen for 10 sec don't touch the slide to power off just keep pressing till apple logo pops up then everything will be regular (nothing will be erased)
  4. Menel macrumors 603


    Aug 4, 2011
    If the above two suggestions don't work. Try running it all the way down, 0%, til it shuts off on it's own.

    Wait til one evening when your low, then play a game or something battery intensive to drain it.

    Then charge to full overnight. The 0% to 100% swing triggers a recalibration of the sensor.

    It's not totally far retched that charge levels may have drifted a bit depending on how long it was in storage and what temperature swings it might have experienced .

    Apple recommends this procedure once every month or so anyway for battery health.
  5. Leonard1818, May 1, 2012
    Last edited: May 1, 2012

    Leonard1818 macrumors 68020

    Nov 15, 2011

    if the above two suggestions don't work, go buy a new phone cause your 2 years is almost up. (check date of orig. post)
  6. Menel macrumors 603


    Aug 4, 2011
    HAHA, tricked by a necro thread :mad:
  7. chesbak macrumors newbie


    Feb 16, 2011
    lol.. nice nice :D
  8. mastsethi macrumors member

    Apr 16, 2012
    If the battery backup is fine, then there is nothing to worry. Make sure you don't overcharge your battery!
  9. thewitt macrumors 68020


    Sep 13, 2011
    You cannot overcharge an iPhone battery. The charging circuitry shuts off automatically.

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