Macbook 2015 Battery Capacity degrading fast ?

Discussion in 'MacBook' started by DAMNiatx, Jun 14, 2015.

  1. Max(IT) Suspended

    Max(IT)

    Joined:
    Dec 8, 2009
    Location:
    Italy
    #251
    take it to the Apple Store
     
  2. mubeenshahid macrumors member

    Joined:
    Jan 5, 2015
    #252
    Sometimes mine shows 82 percent and sometimes 87 percent lol. Its 2.5 year old now
     
  3. kingofwale macrumors 6502a

    kingofwale

    Joined:
    Apr 24, 2010
    #253
    mine was at 90% in late June.

    I will take it in officially when it's below 80%. i rather not have some BS excuse thrown at me at apple store
     
  4. iosuser macrumors 6502a

    iosuser

    Joined:
    Mar 12, 2012
    #254
    How does Coconut determine battery health percentage? My new rMB, built in 10/26/2015, now with 3 cycles on the battery, went from 99.6% health yesterday to 98.2% today.

    Hey, it went from 98.2 to 98.4 to 98.5 as I'm typing this o_O
     
  5. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #255
    Are you talking about the Design Capacity % shown in the bottom green bar? That comes from the maximum charge divide by h design capacity. So for example if you had a maximum charge of 6000 and a design capacity of 6300 that would be a 95% "health" (6000/6300=.95).

    It is normal for that to fluctuate around a little even when new.
     
  6. iosuser macrumors 6502a

    iosuser

    Joined:
    Mar 12, 2012
    #256
    Yes, and thanks for the explanation how Coconut makes that calculation.

    coconut.jpg
     
  7. ghsNick macrumors 68030

    ghsNick

    Joined:
    May 25, 2010
    #257
    There's no way this can be right...right? From the 2nd to 3rd charge it went down to 94%?

    That's 1 day!
     

    Attached Files:

  8. nikster0029 macrumors 6502a

    nikster0029

    Joined:
    Jul 21, 2010
    #258
    I returned my Macbook for this exact issue. No matter which ones, at the store or continuous returns and repurchases, this issue is persistent
     
  9. Serban, Dec 22, 2015
    Last edited: Dec 23, 2015

    Serban Suspended

    Joined:
    Jan 8, 2013
    #259
    if your mac is underload and warmer the battery health will de down by a few percent
    if you let to charge it and cool down the battery health percent will rise
    Tested on 2x 12" Macbook and 1 15" Macbook Pro
     
  10. Newtons Apple macrumors Core

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #260
    I agree with the above and temperature could be a factor in the battery rating.
     
  11. ghsNick macrumors 68030

    ghsNick

    Joined:
    May 25, 2010
    #261
    That sucks. Well I'm within the return period but I saved over $400 at Best Buy with sales and movers coupons...so did you have to return within the 30 day period? Or did they do it after your 3rd issue for the Lemon policy?
     
  12. nikster0029 macrumors 6502a

    nikster0029

    Joined:
    Jul 21, 2010
    #262
    I returned 3 computers within the 14 day policy over the summer. So I played around with it for 1.5 months and then i gave up. Apple said it could have been a bad batch, but I think otherwise. I LOVE LOVE LOVE this computer, but I will now wait till 2.0.
     
  13. navaira macrumors 68040

    navaira

    Joined:
    May 28, 2015
    Location:
    Amsterdam, Netherlands
    #263
    Reading this is fascinating and explains why they are so pricey: Apple have to manufacture two bottom cases and battery packs per every Macbook.
     
  14. headsh0t95 macrumors regular

    Joined:
    Dec 21, 2013
    Location:
    Netherlands
    #264
    It can be that the "Design Capacity" value is just set too high, and that what is now shown as 85-90% is actually the normal capacity which gives you the 9 hours Internet surfing battery usage time. I'd like to know if these laptops become "stable" at 85% or that they drop further and further, which is NOT normal and indeed warrants a return / replacement.
     
  15. kingofwale macrumors 6502a

    kingofwale

    Joined:
    Apr 24, 2010
    #265
    gives me more like 6-7 hours of internet surfing time. which minimal brightness and very low cpu speed
     
  16. Admiral macrumors regular

    Admiral

    Joined:
    Mar 14, 2015
    #266
    On my new Retina MacBook iStat is telling me 244 cycles (six months) and 82% battery capacity. I get about 4-5 hours web surfing out of it. I see warranty service in my future.
     
  17. xDKP macrumors 65816

    xDKP

    Joined:
    Feb 27, 2011
    Location:
    Denmark
    #267
    Did you really test all three over time to see if it were accurate with the performance? Doesn't sound too good.
     
  18. shareef777 Suspended

    shareef777

    Joined:
    Jul 26, 2005
    Location:
    Chicago, IL
    #268
    If it's like mine it'll stay just over 80% (mine was at 82%) till the 3 year mark so that Apple won't do **** for you (even with extended AppleCare). Then it'll drop quickly. Went from 82% to 72% in 6mo (under 700 cycles).
     
  19. MrXiro macrumors 68040

    MrXiro

    Joined:
    Nov 2, 2007
    Location:
    Los Angeles
    #269
    IT'S A CONSPIRACY!!!!
     
  20. objektør macrumors regular

    objektør

    Joined:
    Nov 25, 2014
    Location:
    At home
    #270
    BATTERYGATE!!!!!!!!
     
  21. dmk1974 macrumors 68020

    dmk1974

    Joined:
    Sep 16, 2008
    #271
    Just got my gold MacBook 2 weeks ago. Only 6 cycles so far (I think 3 were out-of-box) and reporting 99% battery life. We'll see how it goes over time.
     

    Attached Files:

  22. MrXiro macrumors 68040

    MrXiro

    Joined:
    Nov 2, 2007
    Location:
    Los Angeles
    #272
    My guess is that age of the battery is a huge factor too. My MBr was only used for 20 days today and only at 7 load cycles now... I'm at 96.1% already but my computer is nearly 6 months old based an manufacture date and the battery is even older. About 7 months.
     
  23. palmwangja macrumors regular

    palmwangja

    Joined:
    Apr 12, 2015
    #273
    What's you all's battery manufacturer?

    My vendor is 'SMP' and now only 87.6% with 52 cycles. :(
     
  24. shareef777 Suspended

    shareef777

    Joined:
    Jul 26, 2005
    Location:
    Chicago, IL
    #274
    SMP as well. 72% at 700 cycles.
     
  25. edmackintosh macrumors newbie

    edmackintosh

    Joined:
    Jan 19, 2016
    #275
    I took my Macbook in to my local Apple reseller as I've been having problems with battery life on a fresh install of El Capitan, getting approx 4 hours. It was only charging to 70-80% (4500-4600mAh) according to the battery app I installed from App Store. They've used Apple Diagnostics and found it charges to 90% supposedly. Could there be any reason for the difference in reported capacity? This is a nightmare for me as I need the machine for work and the battery life is dire. Apple won't fix it with their diagnostic readout.
     

Share This Page