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Battery life dropped considerably on Mountain Lion.

521491 Views 3,396 Replies Latest reply: Oct 28, 2013 5:38 AM by CT RSS Branched to a new discussion.
  • Sulaiman.K Level 1 Level 1 (10 points)

    At least i heard from Observer Mac that they have already said that the Mountain Lion 10.8.2 does have battery life fixed and i'm still thinking and also i have contact AppleCare Australia and they said if i update to 10.8.2 that will help to solve the battery life and now when i downloaded the update from Mac App Store the battery life became worse after downloading the Combo version it seems to be improved and i don't know if it's working or not but the remaining battery it's showing 6:26 at 93% and i think if its misbehaving or not. I can't really confirm if this fixes the battery life issue. But i have to see how does it goes on Combo version.

  • asengskie Level 1 Level 1 (0 points)

    i'm downloading it now but no chance to finish my download tonight my connection was so slow T_T 22days lleft wew even my net was affected by this haha deym... =(

  • Sulaiman.K Level 1 Level 1 (10 points)

    ApocalyArts try to do the SMC reset.

  • crossbytje Level 1 Level 1 (0 points)

    Mine still drains the battery while asleep, I was just out for lunch, it slept for somewhere near 2 hours and lost 2% while doing so. I don't like that!

  • taweeskk Level 1 Level 1 (0 points)

    It is now 62% level for 4:11 hrs remaining. Not too bad?

  • lovejam2012 Level 1 Level 1 (0 points)

    if your laptop is new, regardless which model, I think you should get at least 7 hours after full charge as that is how their product designed and advertised to be..


    now, to your answer regarding AppleCare Aussie telling 10.8.2 will help to resolve or help ?  if help to resolve, then its a misleading, if helps ... then that would be unjustified answer, I won't even care about that comment from them.


    I will only trust a software release notes clearly say that the patch has addressed the battery issue. or a person from Apple actually answer it here .


    by the way, my MBPR has 8:13 hrs max after full charge, and hanging around 7:53 for about 10 ~15 minutes and comes down to normal rate since last night I do all the SMC and PRAM rest.


    now 1% at 6 minutes

  • taweeskk Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 24, 2012 5:40 AM (in response to taweeskk)

    Exact time used is about 37 minutes. I have now lost 71% to 62% (about 9% lost) the remaining time still read 4:11 hrs. If it keep like this, the mean the problem had solved. Let's see next.

  • taweeskk Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 24, 2012 6:03 AM (in response to taweeskk)

    Now 58% level for 3:49 hrs (Exact time use 55 minutes). The calculator reading lost 40 minutes.  So exactly time used 55 minutes for the calculator reading time remaining lost for 40 minutes. This means the calculator say and the actual time use is similar. I'm not expecting the just about right time remaining vs. actual time used. It might be base on the how heavy we are using at a particular time. If the thing going on like this, I'm going to love my mac much more. And will migrate all my family entirely to mac and all Apple products.  I feel the drain is slowing down dramatically. Thank you all of you for all the shared information.

  • Sulaiman.K Level 1 Level 1 (10 points)

    I agree what you said. But when i purchased the product i saw at the full charge that shows below 7 hours and my macbook didn't even reach 7 hours when i was using Lion (My macbook was shipped with Lion) and it only reaches 6:20 or sometimes 6:30.


    I agree that the Apple didnt mention it but i'm still awaiting to see on the release note which will show “Battery life Improvement” in the release note. Plus RMBP has larger battery and it has over 8,000 mAh and mine is 5,524 mAh so it's big difference between RMBP and the MBP 13" so you can't compare with RMBP and 13 inch MacBook Pro.

  • Sulaiman.K Level 1 Level 1 (10 points)
    Currently Being Moderated
    Sep 24, 2012 6:05 AM (in response to taweeskk)

    Now 58% level for 3:49 hrs

    hmm, Whats the exacly time?

  • taweeskk Level 1 Level 1 (0 points)

    The exact time spent was 55 minutes for 40 minutes drain. The drain from calculation  is slower than actual time spent.

  • lovejam2012 Level 1 Level 1 (0 points)

    Nop, nowhere I can find about "battery" in the release note



    I have made a total drain, and after shut down, I will press the power button to drain the left over powers too, and plug in my USB keyboard to further drain it, now when I charge the battery after 0% , the charge time display as 15:49  to full charge.


    lol ..I wish I can wait for that long, but its a good indication that might the software has been falsely displaying full charge status, or other means


    at 5% it says 13:48 to full charge.


    I will see if this particular charge will help with the bug, and report back to you guys

  • Sulaiman.K Level 1 Level 1 (10 points)
    Currently Being Moderated
    Sep 24, 2012 6:12 AM (in response to taweeskk)

    That's very fast drain! I think we're better to put pressure on Apple to fix this issue and i'm having terrible time too.

  • taweeskk Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 24, 2012 6:14 AM (in response to taweeskk)

    If the thing keeping on like this, I expected we can happily working for at least 7 hrs for one charged.  This means more than a lot, because most of us are all travelling places which we can't expect the availability of power supply. Remember those days with Windows based notebook. First thing is to desperately looking for sucklet for a plug. It was not difficult to find indeed, but many situation it just can't plug in or it too far from where we're working. Eg. all the sucklet are in the kitchen, but we have to work in a meeting room. Things like that.

  • Sulaiman.K Level 1 Level 1 (10 points)

    eh? I didn't say that “Battery Life improvement” in the Combo Release note I said i'm awaiting to see the fixed version of Mountain Lion.


    I was hoped that Battery Life may be get fixed in Combo version and now i just saw it seems to be same as Mac App Store version also i have said that i can't comfirm if it's fixed or not.


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