5 Replies Latest reply: Nov 12, 2011 4:29 PM by modular747
thebigDan Level 1 Level 1 (0 points)

ok I just noticed something, using "Memory" app, says i have 100%, butmy iphone says I have 99%, did a force shutdown "Home+Power" now my iphone says i have 98%, "Memory" App says I have 100%, makes me wonder, is my Iphone really charged to full? Is the battery issue really that the batter controll is not showing the right amount, and really maybe my phone might be only charged 30% that's why it dies so fast? Just a thought...


iPhone 4S
  • 1. Re: iphone 4S Battery % discrepancy
    modular747 Level 6 Level 6 (16,495 points)

    Differences between what 3rd party apps show for remaining battery charge and what the iOS shows can only be explained by the developers of the apps you use....

     

    Note that you should routinely calibrate the phone's battery meter by:

     

    1. Charge to full with AC adaptor.

    2. Let phone run until it automatically shuts down - not just to low battery warning.

    3. Recharge fully.

  • 2. Re: iphone 4S Battery % discrepancy
    thebigDan Level 1 Level 1 (0 points)

    When i have battery % turned on, sometimes when i charge it gets stuck at 98 or 99.... I've recharged my battery from a complete drain, meaning the phone goes off completely. I have not seen any differences, and from my knowledge i do not see Apple saying i have to calibrate my battery??? although from dealing with betteries i know what you are talking about...

  • 3. Re: iphone 4S Battery % discrepancy
    modular747 Level 6 Level 6 (16,495 points)
    i do not see Apple saying i have to calibrate my battery???

    Even though they don't refer to it as such, they do recommend at least 1 full charge cycle per month:

     

    "Use iPhone Regularly

    For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Be sure to go through at least one charge cycle per month (charging the battery to 100% and then completely running it down)."

    The "keep the electrons moving occasionally" is silly nonsense and not the reason Li batteries respond to full charge cycles - it's actually calibrating the meter and sensors.  Li battery age and the calibrations changes over time, which is why this should be done monthly.

    http://www.apple.com/batteries/iphone.html

  • 4. Re: iphone 4S Battery % discrepancy
    thebigDan Level 1 Level 1 (0 points)

    once a month... this phone is Brand new? not even a week old???? reading recommendations by people, i've already attempted more than 3 full run downs and full charges, each time from the phone being completely dead. Still the same results....

  • 5. Re: iphone 4S Battery % discrepancy
    modular747 Level 6 Level 6 (16,495 points)

    Take it to Apple for eval or replacement.