Over-charging the 5s?

Discussion in 'iPhone' started by kenknotts, Oct 17, 2013.

  1. kenknotts macrumors 6502

    Joined:
    Sep 23, 2013
    #1
    Not sure why this is but if I leave my 5s charging overnight and unplug it after 6-7 hours, its at 100% and the battery will last for quite awhile. If I charge it for 8 hours or longer, it will immediately drop from 100% to 99% once its unplugged and doesnt last as long. Like today. Was plugged in for around 9 hours. Unplugged it an hour ago, it dropped to 99% right away and now its at 89% after only 31 mins of use. Yesterday, it was still at 85% after 3 hours off the charger and 45 mins of use. WTF?
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    You cannot overcharge an iOS device. The device's charging circuit will prevent more charging once the battery reports that it is full.
     
  3. kenknotts thread starter macrumors 6502

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    Sep 23, 2013
    #3
    Any idea why battery drain occurs much faster when you leave it charging longer than 6-7 hours then?
     
  4. Mercenary macrumors 6502a

    Joined:
    Sep 17, 2012
    #4
    When it gets to 100% it stops charging and runs on battery for a bit! then charges, then stops. Sometimes when you unplug you get it after it's been on battery for a bit so will drop.

    It's normal.
     
  5. LostSoul80 macrumors 68020

    LostSoul80

    Joined:
    Jan 25, 2009
    #5
    Possibly the sensor that measures the battery level needs calibration.
    There is no reason what you are describing could happen, so probably it was just a coincidence. Notice how 1 time is ridiculous for any kind of conclusion.
     
  6. sumsingwong macrumors 6502a

    sumsingwong

    Joined:
    Dec 15, 2012
    #6
    Once it's fully charged, the charger begins trickle charging. It's shuts off. Once the battery drains a little, the charger activates again to fully charge it. You may have unplugged it, when the device was in draining phase which is why it drops down to 99% shortly after unplugging.
     
  7. imaginex20 macrumors 65816

    imaginex20

    Joined:
    Jun 17, 2009
    #7
    same thing happened with my iphone 5 and 5S, when this happens I would just restart the phone and it'll show 100% again. Not sure what is going on...
     
  8. kenknotts thread starter macrumors 6502

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    Sep 23, 2013
    #8
    I see. It drops immediately to 99%, like the second its unplugged
     
  9. AAPLinc macrumors 65816

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    Jul 27, 2012
    Location:
    Hollywood, CA
    #9
    Just got my silver 5S a few days ago, waited to activate. Had it on the charger for almost 24 hours, because I forgot I had it charging. Like others have said, once the iPhone is fully charged, it cuts off the charger and just sits idle with a full charge...so essentially you can't overcharge.
     
  10. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #10
    Don't be so hung up on that percentage indicator.
    It might drop 1% within a second and then stay at a certain level for a while and so on.
     
  11. Mercenary macrumors 6502a

    Joined:
    Sep 17, 2012
    #11
    Battery level also isn't an exact thing. Shake your phone or heat it up and the chemistry changes and the charge appears higher.
     
  12. cynics macrumors G3

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    Jan 8, 2012
  13. dazedxar macrumors member

    Joined:
    Sep 24, 2013
    Location:
    Bay Area, California
    #13
    The battery work like this:

    -It takes in a lot of juice all the way up to about 90%
    -At 90% it takes juice slowly until 100%
    -At 100% it completely stop accepting any charge and deny any juice
    -The phone uses battery slowly until 97%, but the phone still shows 100%
    -The battery says "Oh I can take a little more" and charge up to 100% again
    -Cycle repeats until you unplug it

    No such thing as overcharging a lithium battery
     
  14. EM2013 macrumors 65816

    EM2013

    Joined:
    Sep 2, 2013
    #14
    I didn't know that, I thought it was bad to leave your phone charging overnight. good to know.
     
  15. HybridHB macrumors newbie

    Joined:
    Oct 17, 2013
    #15
    When I have this issue I just reboot the phone, then it will report what appears to be correct numbers.
     
  16. Carlanga macrumors 604

    Carlanga

    Joined:
    Nov 5, 2009
    #16
    yes, the more it's plugged in the more the battery will last.
     
  17. LithePanther macrumors 6502

    Joined:
    Sep 22, 2011
    #17
    That number is an estimate anyways. Battery percentage is really complex and your indicator could say it was 100% but in reality it was only 95%. Or the opposite.
     
  18. HybridHB macrumors newbie

    Joined:
    Oct 17, 2013
    #18
    I know it doesnt matter in reality, but it bothers me when i see it get to 95% within a few mins.
     
  19. jabingla2810 macrumors 68020

    Joined:
    Oct 15, 2008
    #19
    Tip: Turn off the battery percentage and put the stop watch away.

    If you have serious battery issues, you would know about it.
     
  20. Lucille Carter macrumors 65816

    Joined:
    Jul 3, 2013
    #20
    I think you need to stop looking at the battery percentage and just use your phone. You are driving yourself crazy. :p
     
  21. bp1000 macrumors 65816

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    Jul 7, 2011
    #21
    My 5s has actually dropped to 99% on the charger

    It definitely uses a little battery and then trickle charges back up
     
  22. LithePanther macrumors 6502

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    Sep 22, 2011
    #22
    I used to be like that. It's liberating to not care.
     
  23. Namji macrumors 6502a

    Namji

    Joined:
    Aug 13, 2010
    #23
    Can someone check to see when their iPhone 5S is fully charged at 100% does the charging / lightning icon is still displayed next to the battery icon?

    The past two nights I charged my phone overnight ( 8+ hours ) and every morning it reads 100% and the charging icon is still displayed as if it shows that it is still charging.. On my iPhone 4 the charging display turns off once the phone has been charged at 100%.

    Thanks.
     
  24. Jimbo47 macrumors 6502a

    Joined:
    Jun 21, 2010
    #24
    Mine did this on my 4S during beta and final release. The indicator doesn't change. I guess they tweaked the percentage with iOS 7. Previously, it could read 100% but still be charging. Once it was completely full, the indicator changed to the plug instead of the lightening bolt. Now, once it hits 100% it's completely charged and shuts off, but the indicator doesn't change.
     

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