What's with the 1-2% instant drop on unplug?

Discussion in 'iPhone' started by tsduke, Oct 19, 2011.

  1. tsduke macrumors regular

    Joined:
    Oct 10, 2011
    #1
    When I look at my 4S in the morning from an overnight charge it shows 100% while showing the full charge icon. As soon as I unplug it it drops to 98% or 99%. I've never seen any phone do this. Including my iPhone 4 before this.
     
  2. JP30 macrumors newbie

    Joined:
    Oct 12, 2011
    Location:
    NJ
    #2
    Same with mine when I unplugged yesterday, within minutes was down to 99-98% but overnight I only lost about 2-3% on standby which is an improvement I think
     
  3. tsduke thread starter macrumors regular

    Joined:
    Oct 10, 2011
    #3
    Just to clarify...I get the 1-2% drop instantly on unplug from power.
     
  4. filmfanatic24 macrumors 6502

    Joined:
    Sep 5, 2007
    #4
    I have a weird issue where I plug it in to charge it overnight and when I wake up it is at 92% and the usage claims it has been fully charged.
     
  5. EmbraceTheOne macrumors 6502a

    Joined:
    Aug 26, 2011
    #5
    I think it's no problem and you don't have to worry about anything.
     
  6. nomad01 macrumors 68000

    nomad01

    Joined:
    Aug 1, 2005
    Location:
    Birmingham, England
    #6
    Had the same thing this morning. Unplugged, plugged back in again and it charged back up.

    Then stayed at 100% for ages before saw any drop. <shrugs>
     
  7. tsduke thread starter macrumors regular

    Joined:
    Oct 10, 2011
    #7
    I certainly think it's a problem. Instanst 2% drop with no use.:rolleyes:

    ----------

    Same with me when I plug back in and charge back to 100%.
     
  8. chrisu91 macrumors regular

    Joined:
    Jun 28, 2010
    Location:
    Ontario, Canada
    #8
    It's happened with all my iPhones. Likely didn't notice it. Once it gets to 100%, it stops charging (or trickle charges). Instead of constantly charging to keep it at 100%, the phone allows it to drop a percentage or two, and then starts regular charge to top up again. This is my theory anyways. There is nothing wrong with your phone.
     
  9. Hudzilla macrumors 6502a

    Hudzilla

    Joined:
    Nov 12, 2007
    Location:
    England
    #9
    If you look around on this forum, you'll see there are ALOT of people having battery issues.

    Most likely a software issue.
     
  10. tsduke thread starter macrumors regular

    Joined:
    Oct 10, 2011
    #10
    I promise you my 4 never did this. It stayed at 100% when unplugged.
     
  11. Small White Car macrumors G4

    Small White Car

    Joined:
    Aug 29, 2006
    Location:
    Washington DC
    #11
    Because battery indicators are never perfectly accurate to more than 2 or 3%

    Your 98% phone could have more of a charge than the guy with 100%. Or the same. You can't really know and thus it's pointless to worry about the % in any increments less than 5.
     
  12. ccsicecoke macrumors regular

    Joined:
    Aug 19, 2010
    #12
    I would take it as a good sign. It will be able to be charged more next time.

    The only thing you should be worried about is 1% instant increasing say you unplug it while being charged at 99%
     
  13. urkel macrumors 68030

    Joined:
    Nov 3, 2008
    #13
    Most likely, but not definitely. And that my concern. Maybe it's a countdown issue and that last 10% will last us two hours, but maybe the hardware is too powerful and dual core means twice as fast battery drain.

    I really want an answer because I hate that I've disabled so many selling point features just to last a full workday.
     
  14. gtmac macrumors 6502a

    Joined:
    Jun 25, 2010
    #14
    This is how I feel. Yesterday I had to turn off almost everything just to get better usage. I need a full day of use!!
     
  15. mmf01 macrumors member

    Joined:
    Oct 17, 2011
    #15
    I think this is an iOS 5 issue. Same issue with my iPad 2. Immediatly drops to 98%. Reboot device...Back up to 100% after reboot. Already did the battery meter calibration thing too.
     
  16. jgalan14 macrumors 6502

    Joined:
    Oct 11, 2011
    #16
    No issue here lasted 1 hour on 100% with twitter an tapatalk and some emails :D I was on wii tho
     
  17. dusters711 macrumors regular

    Joined:
    Aug 12, 2008
    #17
    When this would happen on my iPhone 4 or 3GS, I would just restart the phone and it would "recalculate" the battery correctly. It would just happen randomly... like I would be using it for 1 minute and I would notice it at 98% so I restart and I'd be back at 100%. Don't know if that helps or not.
     
  18. nomad01 macrumors 68000

    nomad01

    Joined:
    Aug 1, 2005
    Location:
    Birmingham, England
    #18
    Yeah I experienced this with my 4 also.

    However this didn't help with the 4s. It came back up with the same 98% charge and began to deplete quite quickly with light use.
     
  19. iphone1105 macrumors 68020

    iphone1105

    Joined:
    Oct 8, 2009
    #19
    Same here, this is what i do. It happens to me after a long period of charging, usually overnights while sleeping. It reallly no biggy, your battery isn't borked, just restart it and it will show correct...

    Plus that battery meter % is so off .....
     
  20. Booju16 macrumors member

    Joined:
    Jun 15, 2010
    Location:
    Gotham City, NY
    #20
    Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

    That's exactly what happened to me this morning, I was just about to make a thread about it, but you beat me to it. I went from 100% to 98% right after an unplug from my charger at 100%, what gives?!
     
  21. yanki01 macrumors 68030

    yanki01

    Joined:
    Feb 28, 2009
    Location:
    Texas
    #21
    i had this problem on my 3GS, once i got the 4 it went away and haven't seen it since? maybe a restore of the iOS if its really bugging you?
     
  22. AlpinWeissE90 macrumors newbie

    Joined:
    Oct 17, 2011
    #22
    I had this problem as well! It would be at 100% plugged in from an overnight charge. I'd unlock it (still plugged in) and it would drop to 99% and then a few seconds later to 98%.

    Yesterday morning it only charged to 93% despite me unplugging it and plugging it in again. My battery also drained incredibly fast. I couldn't make it through a whole day. I unplug at 7am and I was at 4% battery by 1pm.

    Took it to the Apple store yesterday during lunch and they replaced my phone. I don't seem to have any of the issues anymore but it has only been a day.
     
  23. dusters711 macrumors regular

    Joined:
    Aug 12, 2008
    #23
    Just out of curiosity, did you let your 4S drain all the way to 0% (until it actually shuts off) and then do a full overnight charge yet? I was having quick draining issues that even restarting did not help until I did the complete drain. I usually do this with all my phones when I get them.
     
  24. ZipZap macrumors 601

    Joined:
    Dec 14, 2007
    #24
    Maybe its just a programming issue. Can you tell that you are in fact loosing 2 or 3%?

    Probably not.
     
  25. boshii macrumors 68040

    boshii

    Joined:
    Jul 6, 2008
    Location:
    Atlanta, GA
    #25
    Do yourself a favor and turn Battery Percentage off.
     

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