iPhone 4S battery, anyone else having this problem

Discussion in 'iPhone' started by bsainsbury, Nov 10, 2011.

  1. bsainsbury macrumors newbie

    Joined:
    Nov 10, 2011
    #1
    This isn't about the 4S's battery life, we all know that's an issue. I got the 4S the day it came out so I've had it about a month and starting earlier this week I noticed something weird with the battery. I will charge it at night before I go to bed and let it charge all night while I'm alseep. In the morning it says 100% charged but I when I unplug it, it drops down to 98% right away. It just started a couple days ago. I didn't think too much of it but this morning instead of 98% it said 97%.

    Anyone else having this issue? Anyway to fix it?
     
  2. SL4VE macrumors 6502

    Joined:
    Aug 19, 2010
    #2
    your basically overcharging it, so once its fully charged it will drop down to 89% or so and than recharge. whereas the old iPhones would trickle charge at 100% to keep it topped up.
     
  3. bruinsrme macrumors 603

    bruinsrme

    Joined:
    Oct 26, 2008
    #3
    Is this documented?
     
  4. MrXiro macrumors 68040

    MrXiro

    Joined:
    Nov 2, 2007
    Location:
    Los Angeles
    #4
    Happens to my MacBook all the time and my Evo 4g.
     
  5. r2shyyou macrumors 68000

    r2shyyou

    Joined:
    Oct 3, 2010
    Location:
    Paris, France
    #5
    From what I've been able to find on Apple's website, the iPhone 4S uses the same battery type (litium-ion) as the older models:

    iPhone 4S specs
    iPhone 4 specs
    iPhone 3GS specs

    As such, they should follow the same charging style. Below is Apple's documented info regarding the charging style of lithium-ion batteries:

    I know it notes an iPod in the above but it should be the same for the iPhone.

    Below are links to Apple's battery documents, if you're interested:

    Litium-ion Batteries
    About iPhone Batteries
     
  6. SL4VE macrumors 6502

    Joined:
    Aug 19, 2010
    #6
    i "think" its due to the processor heat/speed etc not down to the battery for doing this. dont use it against me its just a theory.. HTC have issues like this on their 1ghz processor phones. im just adding my thoughts more than anything, but it makes sense
     
  7. orange42 macrumors 6502a

    Joined:
    Apr 12, 2009
    #7
    I've been having VERY good battery life lately, and when I unplugged mine today at 100% to go to work, I noticed it dropped to 96% really quickly so I was sort of wondering why. I turned off the phone then turned it back on and it was at 99%.
     

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