Battery health

Discussion in 'MacBook Pro' started by iLLucionist, Oct 26, 2011.

  1. iLLucionist macrumors regular

    Joined:
    Apr 6, 2008
    Location:
    The Netherlands
    #1
    Hi,

    I have concerns about the battery life of my MacBook Pro (15", Late 2010: 6,2; 2.8 i7 / 4 GB / SSD 256). I have about 116 cycles and all of a sudden this week the health drops from a steady 95-96% to 92%.

    Is 92% for 116 cycles bad or good? I used my laptop as it is supposed to: days resting on my desk with the plug in, days traveling. On average, I recharge my mac 4 times a week. It's 11 months old.

    Any suggestions or experiences, anybody?

    Thanks!!
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    It's normal. Do a search for any of the hundreds of threads on this tired topic.
     
  3. Legion93 macrumors 6502a

    Legion93

    Joined:
    Apr 6, 2011
    Location:
    Death Star, Rishi Maze
    #3
    Are you using the iStat widget? I had a MacBook Air 2010 model (bought January 2011) and recently sold it. It had over 200 cycles and haven't noticed any changes in battery. I constantly kept on checking iStat and most of the time it was at 95%, I should remind you the health indicator is not reliable, it constantly changes for example a month ago it was 89% and after couple of weeks it increased back up to 92%.

    Keeping in mind Apple states that your Mac's health would be at 80% when you reach 300 charge cycles. After this it is recommended to replace the battery (Apple offers this service for a fee of £99).

    I should stress that as long as you don't see long term changes in the battery of your MBP it should all be fine as the heath indicator does not really give a clear indication thus quite unreliable.
     
  4. sweetbrat macrumors 65816

    sweetbrat

    Joined:
    Jun 17, 2009
    Location:
    Redford, MI
    #4
    I wouldn't worry. Battery health fluctuates; one day it might read a few percent higher or lower than the day before. Even at 92%, you still have a lot of battery capacity left.
     
  5. GuitarG20 macrumors 65816

    GuitarG20

    Joined:
    Jun 3, 2011
    #5
    I am confident it is 80% at 1000 cycles now...

    -Apple Notebook Batteries
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    Make that over 1,000 threads!
    Normal. This should answer most, if not all, of your battery questions:
     
  7. Legion93 macrumors 6502a

    Legion93

    Joined:
    Apr 6, 2011
    Location:
    Death Star, Rishi Maze
    #7

    Wow, how did they upgrade the battery I thought it used to be 300 cycles for 80% well that was the case last year I checked but I doubt anyone would achieve 1000 counts in the course of the laptop, unless they're recharging 5 times a day... Which is strange :D
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    Read the Battery FAQ. It explains which batteries are expected to retain up to 80% for 300, 750 or 1000 cycles.
     
  9. GuitarG20 macrumors 65816

    GuitarG20

    Joined:
    Jun 3, 2011
    #9
    1 cycle a day is 2.73 years to a thousand cycles... mine is at 111 cycles with 25 weeks, which means in about 4.3 years I will be at 1000 cycles. I expect my computer to last at least that long...
     
  10. iLLucionist thread starter macrumors regular

    Joined:
    Apr 6, 2008
    Location:
    The Netherlands
    #10
    Thanks!

    Hi all, thanks for all the comments. I think I'll be fine then :) I always find it a bit scary, because in the non-unibody days I often had batteries (I dealt with over 10 MacBook Pro's I had under administration) that were unpredictable.

    Cheers!
     

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