macbook battery at 84% health

Discussion in 'MacBook' started by mag2001, Jun 13, 2016.

  1. mag2001 macrumors 6502

    Joined:
    May 24, 2007
    Location:
    San Antonio, TX
    #1
    100 cycles on my MacBook 12inch and my battery is at 84% health. Is this normal? My battery also drains when not in use. I was at 50% when I went to bed and next morning it was completely dead.
     
  2. FilmIndustryGuy macrumors member

    Joined:
    May 12, 2015
    #2
    I'm at 82 cycles and 92% but it fluctuates over time. the dead laptop while closed sound like an issue. charge it up and check again in morning. if it drains that fast either u set it to not sleep or take it to apple so they can run a test if battery is dying.
     
  3. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #3
    It's not normal. The battery should be able to withstand 1,000 cycles at 80% health. There have been reports of 12" MacBook having defective batteries and it looks like you have one.

    For what it's worth, my 2016 is at 93% health after just 33 cycles, so looks like I'm on the same boat...
     
  4. mattopotamus macrumors G5

    mattopotamus

    Joined:
    Jun 12, 2012
    #4
    Actually it is not technically defective. Until you are lower than 80% with less than 1000 cycles, apple is probably not going to do anything. Just keep an eye on it. I have had macs drop to the mid 80's before reaching 100 cycles and stay there for well over 1000
     
  5. FilmIndustryGuy macrumors member

    Joined:
    May 12, 2015
    #5
    ah, I had the same thing happen and then it went up later. Do a full charge, discharge cycle and see how the percentage life increases. It moves around before 100 cycles. A good indicator of a battery becoming faulty is when the mac discharges big time overnight or if the percentages move around out of whack. Also if you hit 20% and the mac just dies on you. If u go to apple, they will run a test and tell you if your battery is malfunctioning. They are nicer about everything if you have purchased apple care form my experience.
     
  6. polee macrumors 6502a

    polee

    Joined:
    Jul 22, 2008
    #6
    So this happens with the Macbook 2016 too...
     
  7. SBruv macrumors 6502

    Joined:
    Sep 25, 2008
    #7
    I had the same problem with my 2015 rMB. Took it to the Apple Store who replaced the battery. The new battery did the same thing, so back I went to Apple, who diagnosed a voltage fault on the Logic Board and replaced the battery and the board.

    Now, on my third battery and second logic board, the same thing is happening again. I'm at 96% after six cycles.

    There's clearly an issue with the rMB battery in general. Can anyone report figures given by Coconut Battery for their rMB that aren't dismal..?
     
  8. polee macrumors 6502a

    polee

    Joined:
    Jul 22, 2008
    #8
    It looks like many if not all have the battery issue with the rMB 2015. Mine is 13 months old, 64 charges and about 4840 mah or thereabouts. Slightly above 90 percent.
     
  9. sdfd504 macrumors regular

    Joined:
    Jul 16, 2007
    Location:
    Soddy Daisy, TN
    #9
    Mine is 2015 first release model that I just had to send off for a new battery. 103 cycles and the service battery indicatior was on instead of it showing the battery charge percentage. Ended up being below 70% with a 5-7 day turnaround time for the repair since they can't do them in store.

    Mine was a month out of warranty but I had called apple care twice prior to the warranty expiring with complaints on my battery which helped me out with this repair. I can foresee a major recall on these batteries at some point soon.
     
  10. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #10
    For what it's worth, mine was at 93% a week ago, but for the past few days it's been fluctuating between 95-96%. So as someone said above, give it some time as it will fluctuate a lot in the beginning. If it drops to low 80s and below, then you have a serious issue and it needs replacement.
     
  11. SBruv macrumors 6502

    Joined:
    Sep 25, 2008
    #11
    I wish that were the case, but in my experience of three batteries, now, the trend is rapidly downward.

    Now at 95% after 7 cycles. Ridiculous…
     
  12. objektør, Jun 23, 2016
    Last edited: Jun 23, 2016

    objektør macrumors regular

    objektør

    Joined:
    Nov 25, 2014
    Location:
    At home
    #12
    It is definitively fluctuating a lot for everyone it seems. Some more, some less. I almost consider my self as lucky: I have been down at 82% health but now back again at 88%. 14 months old and at 286 cycles.
    I don't experience any trouble in real time use though. I use it as it fits me. Charge when possible, on battery when not. Still lasts me through the day when I can keep screen brightness at 50-75%.

    I wondered what happens if this service indicator comes up. Can you still use it on charge than?
    My gf old MBP (2009) had a bad battery after 4 years of use. I didn't bother to shift it straight away but after a while she got an issue with the trackpad and cd drive. I figured it could have to do with the expanded battery and put a new battery in it. Issues solved.
    Could a bad battery in the rMB cause any problems (apart from reduced battery time)?
     
  13. sdfd504 macrumors regular

    Joined:
    Jul 16, 2007
    Location:
    Soddy Daisy, TN
    #13
    Mine had the service battery indicator instead of showing the battery percentage. It charged and worked as normal but had a very poor discharge rate.
     
  14. AppleWarMachine macrumors 6502a

    AppleWarMachine

    Joined:
    Sep 27, 2011
    Location:
    Michigan, US
    #14
    I'm at 85 cycles with 85.6% health, but I'm not too worried because I have AppleCare, which will replace the battery if it drops below 80%, but still not a good sign :(
     
  15. objektør macrumors regular

    objektør

    Joined:
    Nov 25, 2014
    Location:
    At home
    #15
    still 14 months old but at 296 cycles and health at 91,5% now, coming from 88% for a few weeks ago (at 286 cycles) and even been as low as 82% a couple of months ago.
    Last few days it's been used heavily on rendering animations in Keynote, iMovie and Sketchup. Battery got quite warm but health went up to 92%.
    I don't try to understand. I just use it as it pleases me (and I don't even have Applecare!)
     
  16. asfalloth macrumors member

    asfalloth

    Joined:
    Dec 4, 2013
    Location:
    London
    #16
    Mine has been awesome thus far, early days though, had a few deep discharges on this one too. Two weeks old.

    Screenshot 2016-07-09 08.43.26.png
     
  17. dilinger macrumors newbie

    Joined:
    Mar 21, 2016
    #17
    [​IMG]

    Don't wish to be out of topic as this is an MBP
    But which bar is the battery health? First or second?
    And is this considered healthy?

    Many thanks!!!
     
  18. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #18
    Second i.e. the health is at 78.8%. It should be good for 1,000 cycles at 80%, so it's not ideal.
     
  19. icymountain macrumors regular

    Joined:
    Dec 12, 2006
    #19
    I remember seeing average battery health curves on Coconut-battery online, but cannot find them anymore. I can just see the average for my laptop, when I upload my curve, but I cannot select any laptop and see its curve.
    Out of curiosity, could someone upload the curve that shows for the Macbook Retina ? That would give a fair sense whether they die out more quickly than other macs or not...
     
  20. Samuelsan2001 macrumors 603

    Joined:
    Oct 24, 2013
    #20
    Yeah but this battery is six years old, that 1000 cycles is nowhere near as important as age despite what many believe. Apple only give that 1000 cycles warranty to 80% within their warranty period 3 years.
    Dilinger your battery is in great health for its age but watch for swelling or other issues as it is now getting to the will need replacing soon stage and battery swelling or leakage can destroy your laptop.
     
  21. dilinger macrumors newbie

    Joined:
    Mar 21, 2016
    #21
    My friend this battery is a replaced one, dated as you can see, on December 2014...

    Not even 2 years old.

    I get it you were confused by the age of the laptop, but I had it replaced..
     
  22. gooseta macrumors member

    gooseta

    Joined:
    Jul 9, 2015
    Location:
    London, UK
    #22
    My rmb's battery life has fallen significantly, now getting like 4 hours as opposed to 8+ previously. 247 cycles, 84% health, can't get a replacement. Has anyone else experienced similar degradation?
     

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