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battery bug

3014 Views 14 Replies Latest reply: Jan 3, 2013 7:34 PM by fugazi48 RSS
chalooch101 Calculating status...
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Jul 10, 2010 11:58 AM
i have my iphone 4 plugged into the charger and it is fully charged with the power plug adapter icon shown in the top right battery icon and 100%. sometimes when i come back a few minutes later the icon changes to the charging icon and the charger was never unplugged form the phone during this time. the battery icon in the center of the screen is no longer full. why is the battery losing power if i never removed if from the charger? is this a software display problem?
  • w7ox Level 4 Level 4 (2,385 points)
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    Jul 10, 2010 12:21 PM (in response to chalooch101)
    It's not unusual with Apple devices for them to show fully charged and then not and then charge some more. My MacBook cycles that way and I've seen it in iPhones and my iPad.

    If the charge level falls dramatically like below 95% then there may be a problem in the charge circuitry.

    Phil
    MacBook Al 2.4, Mac OS X (10.6.4), Dell Win7 Desktop ; iPhone 4; iPad 3G 64GB
  • pberk Level 2 Level 2 (240 points)
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    Jul 11, 2010 11:10 AM (in response to chalooch101)
    Did you calibrate your battery? (recommended for all rechargeable device)... dont rely on the percentage indicator until you do...
    Mac OS X (10.4.10)
  • hpd777 Calculating status...
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    Jul 11, 2010 1:17 PM (in response to chalooch101)
    how to you calibrate the battery?
    iphone, iPhone OS 3.1.3
  • sn4p2k Level 4 Level 4 (1,215 points)
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    Jul 11, 2010 1:29 PM (in response to hpd777)
    you let it fully deplete to nothing and charge it up
    macbook pro 17 inch - iPhone 4, Mac OS X (10.6.1)
  • pberk Level 2 Level 2 (240 points)
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    Jul 11, 2010 5:35 PM (in response to hpd777)
    You have to let it fully discharge, to the point were the phone will turn itself off... and then give it a full charge (should take 4.5 to 5 hours).... most be suggest cycling it twice like that...
    Mac OS X (10.4.10)
  • pberk Level 2 Level 2 (240 points)
    Currently Being Moderated
    Jul 12, 2010 5:58 AM (in response to chalooch101)
    Not sure I understand your question...

    How do you know that your phone isn't fully charged? Calibration is supposed to condition the battery to take a full charge... but there are indications in other threads here on the subject that you shouldn't rely on the % indicator until you have cycled the battery...

    Just FYI - Apple - as well as some other manufacturers - has always recommended that you recycle your battery completely in all of its rechargeable products at least monthly to keep your rechargeable battery conditioned
    Mac OS X (10.4.10)
  • w7ox Level 4 Level 4 (2,385 points)
    Currently Being Moderated
    Jul 12, 2010 7:25 AM (in response to chalooch101)
    It could be that your mains power is not up to the normal level. Measure it if you can.

    OR take the phone to Apple; it could have defective charge circuitry or the charger could have a problem.

    Hard to diagnose by internet or phone.

    Phil
    MacBook Al 2.4, Mac OS X (10.6.4), Dell Win7 Desktop ; iPhone 4; iPad 3G 64GB
  • Abers Level 1 Level 1 (0 points)
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    Jul 12, 2010 7:36 AM (in response to chalooch101)
    I have the same problem with a 3G. I found the phone battery display after charging for a decent amount of time (hours) was nowhere near full. If you turn off the phone (hold the on/off button for +5 secs) and then restart it shows it has a full charge! So something fishy going on with the software. I've not changed where I charge the phone from when it was running the previous OS. Now that it is on iOS4 it behaves stangely. If I plug it into my iMac it charges and the batter indicator display shows a full charge. And it seems to be somewhat sensitive to where you charge it. I have tried other sockets in the house and the problem does not appear. Maybe the new OS is very sensitive to subtle variations in voltage? But turing it off an on again shows the real charge.
    iMac 24" Full spec, Mac OS X (10.6.2), iPhone 3G
  • pberk Level 2 Level 2 (240 points)
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    Jul 12, 2010 8:09 AM (in response to chalooch101)
    chalooch101 wrote:
    forgetting the % indicator i have left the battery plugged in for 2 days and its still has charging icon in top right of screen instead of power plug icon. after this long i think it should switch to ac power instead of continuing to charge the battery
    chalooch101 wrote:
    forgetting the % indicator i have left the battery plugged in for 2 days and its still has charging icon in top right of screen instead of power plug icon. after this long i think it should switch to ac power instead of continuing to charge the battery


    What do you mean "switch to ac power"? The phone doesn't run off a/c power, only off the battery... and as long as you have the phone plugged into a charger the lighting bolt icon will be lit to show the phone charging..
    Mac OS X (10.4.10)
  • pberk Level 2 Level 2 (240 points)
    Currently Being Moderated
    Jul 13, 2010 3:48 PM (in response to chalooch101)
    Where did you find that information? I don't think it's accurate... if it were, when your phone is completely drained, it would come on again the minute you plugged it into to a power source... but ever since the first iphone, it will not come on until the BATTERY reaches a certain level...

    Thats why it's impossible to damage your iphone battery by "overcharging" it - the a/c doesn't push power into that type of battery... the battery pulls power as needed...
    Mac OS X (10.4.10)
  • fugazi48 Calculating status...
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    Jan 3, 2013 7:34 PM (in response to chalooch101)

    The phone only runs on DC. It only receives DC, so there is no way it is running on AC power

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