Mid09 Macbook Pro Defect Battery?

Discussion in 'MacBook Pro' started by sushimomo, Aug 10, 2009.

  1. sushimomo macrumors newbie

    Joined:
    Aug 10, 2009
    #1
    [​IMG]

    I've been using this macbook pro for less then a week.
    The battery capacity seems to drop alot?

    Anyone having this problem too?
     
  2. TheBritishBloke macrumors 68030

    TheBritishBloke

    Joined:
    Jul 21, 2009
    Location:
    United Kingdom
    #2
    Coconut battery isn't 100% accurate. However if you're still in the 14day period after purchase, I'd still take it to apple for a replacement as they replace them 'no questions asked' within 14 days.
     
  3. Nautigar macrumors regular

    Joined:
    Oct 4, 2007
    #3
    I have exactly the same problem. Battery Health was 100% when it arrived, 96% after the first charge cycle, and 92% after the second cycle. I am still undecided what to do about that.

    Question to the original poster: Are you using the charger that came with the MBP (I think it is 60W), or did you use a more powerful charger (I think 80W) from the 15" models?
     
  4. sushimomo thread starter macrumors newbie

    Joined:
    Aug 10, 2009
    #4
    I am using the default charger that came with the macbook.

    Right now my battery capacity is:
    [​IMG]

    Btw i calibrated my battery already
    Should i go down to the apple store to let them have a look?
     
  5. geoffreak macrumors 68020

    geoffreak

    Joined:
    Feb 8, 2008
    #5
    Battery capacity fluctuates by as much as 10%. There is absolutely nothing wrong with your battery.
     
  6. onesmallmac macrumors newbie

    Joined:
    Aug 10, 2009
    Location:
    Germany, hopefully London sometime ^^
    #6
    Hey Guys, I have the exact same problem. Got my Macbook Pro 13" about 3 weeks ago...my battery came with approx. 5500 mAh and is now at 5301 with 10 charge cycles (according to istat nano and system profiler). I calibrated the battery right after I got it...seems the battery didn't like that. :confused:

    Thoughts anyone? I wonder how common this issue is...

    Dan
     
  7. geoffreak macrumors 68020

    geoffreak

    Joined:
    Feb 8, 2008
  8. onesmallmac macrumors newbie

    Joined:
    Aug 10, 2009
    Location:
    Germany, hopefully London sometime ^^
    #8
    I'm not a technician but I doubt that after proper calibration the battery capacity should fluctuate by 10%...mine does fluctuate between 96-97%
     
  9. iBookG4user macrumors 604

    iBookG4user

    Joined:
    Jun 27, 2006
    Location:
    Seattle, WA
    #9
    If you're worried, go to system profiler and then to Power and check what it says under Health Information, specifically "Condition". Although I'd give it a bit longer to see if it stabilizes.
     
  10. geoffreak macrumors 68020

    geoffreak

    Joined:
    Feb 8, 2008
    #10
    The reason it does this is not because the battery is fluctuating, but the software that checks health isn't entirely accurate. Calibration will only set a rough "median" for the fluctuation.
     

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