How much does battery health decline?

Discussion in 'iPhone' started by andymac2210, Jan 31, 2012.

  1. andymac2210 macrumors regular

    Joined:
    Jul 18, 2011
    #1
    After 60 charge cycles on my 2010 macbook pro the battery healthy is at a fairly decent 90% according to istat pro.
    Not a big deal since it can be plugged in most of the time anyway.
    But a phone is quite different, a phone spends 95%(or more) of it's life on the move, not charging.

    Would this be similar to the iPhones battery?
    If so, you'd be looking at a 10% degradation in 2 months assuming 1 charge a day.
    That's 30% in 6 months and 60% in 1 year!
     
  2. /user/me macrumors 6502

    Joined:
    Feb 28, 2011
    #2
    Your battery will be fine. Istat is pretty accurate, but not 100%. I had my 4 for almost 2 years now with virtually no noticeable drop in battery life.
     
  3. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #3
    Battery decline isn't linear anyways. Stop worrying about your battery and just use your iPhone/Macbook Pro how you want to. You're wasting your time fussing about things that can be easily and cheaply replaced.
     
  4. mrsir2009 macrumors 604

    mrsir2009

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    Sep 17, 2009
    Location:
    Melbourne, Australia
    #4
    The iPhones battery is pretty much the same type as any other on the cellphone market... And none of my cellphones have ever had a significant decrease in battery life.
     
  5. andymac2210 thread starter macrumors regular

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    Jul 18, 2011
    #5
    So are you saying the battery decline may be slower than that of the macbook pro's battery?
     
  6. Kyotoma macrumors 68000

    Kyotoma

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    Nov 11, 2010
    Location:
    Carnegie and Ontario
    #6
    Not necessarily. We are simply advising you to not worry about it.
     
  7. Small White Car macrumors G4

    Small White Car

    Joined:
    Aug 29, 2006
    Location:
    Washington DC
    #7
    I think that after 5 years of iPhones, it'd be pretty common knowledge by now if this were true.

    It's far more likely that this isn't the case than it being true and everyone hiding it somehow.
     
  8. TG1 macrumors 6502a

    TG1

    Joined:
    Feb 21, 2011
    #8
    19 months on my iPhone 4 and still going strong. I don't think I've even lost 10% of capacity. Use about 1 gb of cellular data per month and lots more over wifi. Charge almost once a day.
     
  9. Interstella5555 macrumors 603

    Interstella5555

    Joined:
    Jun 30, 2008
    #9
    [​IMG]

    you should check your math
     
  10. kadentrom macrumors newbie

    Joined:
    Feb 2, 2012
    #10
    Depending upon the individual there may be an increase in irritability and perhaps some trouble staying focused, but overall, the body and the mind still function as long as the sleep deprivation doesn't continue.
     
  11. EmbraceTheOne macrumors 6502a

    Joined:
    Aug 26, 2011
    #11
    I honestly wouldn't worry about it that much.

    2011 Macbook Pro, Purchased Late June. 262 Charge Cycles, 94% health.
     
  12. jamewhite86, Feb 3, 2012
    Last edited: Feb 13, 2012

    jamewhite86 macrumors newbie

    Joined:
    Feb 3, 2012
    #12
    How much does battery health decline?

    I dont plug in my power adapter when i come back from my friends and the battery will run out. the last two times the health has dropped dramatically. thanks for lot of information.
     
  13. lordofthereef macrumors G5

    lordofthereef

    Joined:
    Nov 29, 2011
    Location:
    Boston, MA
    #13
    Just think about what you are implying. I assume you have an iPhone. Have you experienced this over the course of a year? No? We;ll then, you answered your own question.

    Going a bit deeper, where are you getting these numbers. Based on the degradation level that a piece of third party software told you about your one device you tested? That is hardly going to be a statistically relevant number when trying to look at things as a whole. I am sure there are threads, tests, etc. about this. Did you search? Not trying to be rude, but the forums seem to be teaming with questions like this.
     

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