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Battery life dropped considerably on Mountain Lion.

520716 Views 3,396 Replies Latest reply: Oct 28, 2013 5:38 AM by CT RSS Branched to a new discussion.
  • tcphoto1 Level 1 Level 1 (35 points)

    After seeing my battery bounce from 2.5 hours to 3.5 and then to 2 hours following the 10.8.2 update, I am going to do a clean install. My bootable DVD burning is at the 1.5 hour mark so patience is at a premium. I plan to restore from my Time Machine to reinstall my CS5, Pages and other applications. Wish me luck.

  • malzbier Calculating status...

    Take the advice of the Apple rep and get your MacBook to an Apple store and have them diagnose the issues.  If there's something seriously wrong with it, Apple will generally step up and make it right...they have for me and thousands of others.

    Thanks for your confirmation. I think I will go there by monday. I called the local service provider already and they were really nice. I just hope it's nothing worse than the battery. On the other hand, as you said, it can very well be a logic board problem.

    RIght now I am backing up my installation and data via time machine and creating a boot USB drive, just in case^^. You never know.

     

    The crashes all of a sudden happened. And stopped suddenly as well. It hasn't crashed on movement since 3 weeks or so. As if it never happened. Apart form the battery life, you can't tell that the mbp has a problem. All is running smooth, it's not getting warm. Nothing. I can work normally. Just not when unplugged from electricity. 45 minutes is a bit too less^^ to work with.

     

    Hugs

    malzi

  • richsadams Level 1 Level 1 (70 points)
    Currently Being Moderated
    Sep 21, 2012 12:58 PM (in response to malzbier)

    tcphoto1 wrote:

     

    After seeing my battery bounce from 2.5 hours to 3.5 and then to 2 hours following the 10.8.2 update, I am going to do a clean install. My bootable DVD burning is at the 1.5 hour mark so patience is at a premium. I plan to restore from my Time Machine to reinstall my CS5, Pages and other applications. Wish me luck.

    malzbier wrote:

     

     

    Take the advice of the Apple rep and get your MacBook to an Apple store and have them diagnose the issues.  If there's something seriously wrong with it, Apple will generally step up and make it right...they have for me and thousands of others.

     

    Thanks for your confirmation. I think I will go there by monday. I called the local service provider already and they were really nice. I just hope it's nothing worse than the battery. On the other hand, as you said, it can very well be a logic board problem.

    RIght now I am backing up my installation and data via time machine and creating a boot USB drive, just in case^^. You never know.

     

    The crashes all of a sudden happened. And stopped suddenly as well. It hasn't crashed on movement since 3 weeks or so. As if it never happened. Apart form the battery life, you can't tell that the mbp has a problem. All is running smooth, it's not getting warm. Nothing. I can work normally. Just not when unplugged from electricity. 45 minutes is a bit too less^^ to work with.

     

    Hugs

    malzi

     

    Sounds good!  I for one would be interested in hearing the outcome from both of your situations.

     

    Best of luck!

  • brianx87 Calculating status...

    Olds ghosts have returned to haunt the MBA Late 2010. I’ve see a significant drop in battery life. Quite hard to tell really where I stand as it keeps changing. At worst health dropped to 16% with a 2hr life fully charged and at the time of writing, after resetting the SMC its now at 90% health with battery life performing normally. This is changing as I go along, after the 10.8.2 update it stated that I had a service battery, fixed after a SMC and fixed permissions reset though no health/life increase, though now it seems that the life has jumped up enormously after my second reset. Second reset and nothing happens, check osxdaily for conversations and boom, battery returns to normal. I’ll repost what dark and strange journey my battery is taking with this damned bloody lion pursuing its ***. Oh I see, percentage likes to go down, time remaining likes to go up then???

  • antonywu Level 1 Level 1 (0 points)

    The battery life in 10.8.2 is about the same as 10.8.1. I get about 5 hours of normal usage time (if I don't watch any youtube vides). If I watch video, the life drops to about 2 hours.

     

    That is significantly better with 10.7.x and 10.8.0, where I got roughly 3 hours.


    The battery is already two years old (from a mid 2010 MBP 15"), so it makes sense that battery doesn't last close to 7 hours.

  • PeterBacani Calculating status...
    Currently Being Moderated
    Sep 21, 2012 8:51 PM (in response to jt519)

    Wow you're lucky jt519, my mbp mid-2009's battery is still horrible after "updating" to 10.8.2 the day it was released, and did a PRAM and SMC reset last night.  Today I charged this to 100% and im getting ~2.5 hours when it was over 5 hours before mountain lion.  I have never been so dissapointed in Apple. Consumer groups should have Apple remove "most advanced operating system" from their marketing materials - this is not how an advanced operating system should behave.  for duping people into buying their macs that gets damanged by software updates - they should be held accountable for this mess.

     

    <Edited by Host>

  • Beisarius Level 1 Level 1 (0 points)

    Richsadams and apocaly.

     

     

    Yes and no. Changing the OSes will change power requirements but not necessarily the SMC. So on an older MBP, going to ML or L did not change the SMC. Furthermore, the latest SMC will never be replaced with an older one. try it and you will refuse to do it.

     

    Now, richsadams, you got 1.7 as your machine is eligible for it. A 2010. But I have machines with 1.6 that will not change SMC as Apple has released no updates in 2-3 years. ML will not change that.

     

    The MBA I tested 10.8.2 did not change SMC, it remained at 2.5ft. Yet clearly 10.8.2 had an effect.

     

    Apocaly: Lion was nowhere advertised as giving 9 hrs. But if you did get 9, not bad. Now add ML, advertised as 7 under specific conditions, and that is not too bad. If you have done a clean install and get under 6, it means you consume 1000 mAh. On your machine- same as the ones I got, IT IS A LOT. So what drains it? I do not know.

     

    Are you on wireless n or g? Good steady signal?

    Any peripherals?

    Done the clean install?

    Is preview on?

     

    If the answer is Yes to any of these, might be the cause. If no, then you might try these.

     

    If it still does not work, contact Apple. But you are studying abroad, i think. Still i would try. You would be surprised what they can do for you.

     

    After a few cycles and reboots 10.8.2 is clearly settled, and am sure others have observed this. Steady performance. Two night sleep tests are telling me 1-2 % drain over 10 hrs, so should be good.  Writing this, at 84% says 7.36. But should I begin surfing, it will drop to 6.

     

     

    iOS 6. Did not think it possible, but it sped and smoothed out my iphone 4. Am getting the 5 today.

  • Beisarius Level 1 Level 1 (0 points)

    PeterBacani,

     

    For yourself and other people that either read these posts and did not listened, or whom are too mad to think straight. I REINSTALLED, clean, a LION version on a 3.1 MBP, Santa Rosa. The effects were immediate, a -2000 mAh operating range.

     

    Gone back to Lion, -1300 to -1500. Or up to 3 hrs as it should.

     

    So add ML to this and you will burn even faster. The architecture and software is designed and optimized for modern CPU/GPU. Like with an Iphone, so on. Simultaneous processes, faster RAM cycles...

     

    Throw ML on an older machine and to do the same calculations as on a 2011/2012 macbook it will have to boost processing power in yours. And the way that is achieved... is voltage increase and wattage consumption. CPU has to burn faster as it cannot hyperthread processes. Its basic electronics. It's like an older car with 4 speeds vs one cruising on the HWY in a 6th gear. Guess which one is more efficient..

     

    A 2009 /early 2010 machine and power drain, I will defer to Apple's ads and ask you, where have you read anything about ML expecting to perform on those anywhere closer to the original system you got on it? Nowhere. ML will work but demand more on the older architecture.

     

    In the piloting world they used to say "Always trust the instrument." The human is 99% of times in error. So in this case, always trust your wattage drain reports, they are accurately telling you that you burn a lot more. Perceptions that Apple mislead customers are unfounded, in my opinion.

     

    Just look at iOS 6 and maps.. Apple admitted right away the issue and is fixing it.  So Apple has no qualms admitting something.

  • Gman9855 Calculating status...

    having the same battery life problem like the rest of you guys..  seems like when i reset the SMC everything is back to normal and my battery life doubles to nearly where it used to be.  First time i did this though it only lasted for about a day or less.  Did it a second time last night and back to good battery life again, hope it stays---  i noticed though that the CPU temp goes from having been 75c+ before resetting SMC, to under 50c steady afterwards.  Anyone notice the same thing?

  • starrc Calculating status...
    Currently Being Moderated
    Sep 22, 2012 7:48 AM (in response to Gman9855)

    hi , does anyone know how to reset the "SMC"

     

    as i have no ideal how its working, or how can i reset the "SMC"

     

    thnk you very much

  • Maziyar Level 1 Level 1 (10 points)

    I don't see any battery life improvemnt on 10.8.2. It's still 5 to 5:30 with Wi-Fi usage. (MBPR 2.3/16/256)

     

    It's been two months since I got this machine and now it's 12 cycles. (It's always plugged)

     

    Do I have to SMC reset now to see the change or the time is near to be OK in this situation?

     

     

     

    Thanks

  • taweeskk Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 22, 2012 9:34 AM (in response to Maziyar)

    I have the same problem. The battery fast drain still not improve. I have tried SMC. Shutdown the computer. Connect the power adaptor, and pressing left shift + control + option + power key simultaneously then release all the bottons. Turn on the computer.  I still wait and see what will happen next.

  • richsadams Level 1 Level 1 (70 points)

    Beisarius wrote:

     

    Richsadams and apocaly.

     

     

    Yes and no. Changing the OSes will change power requirements but not necessarily the SMC. So on an older MBP, going to ML or L did not change the SMC. Furthermore, the latest SMC will never be replaced with an older one. try it and you will refuse to do it.

     

    Agreed.  That's exactly what I've been saying all along.  Also agreed, you cannot "downgrade" the SMC on your own.  The firmware would have to be flashed with an older version and the system won't let you do that.  AFAIK there's no reason it couldn't be done, (same as flashing any computer's BIOS) but it would have to be via Apple or someone that could override the system.  Based on a couple of posts it doesn't seem Apple is keen on doing that.

     

     

    Beisarius wrote:

     

    Now, richsadams, you got 1.7 as your machine is eligible for it. A 2010. But I have machines with 1.6 that will not change SMC as Apple has released no updates in 2-3 years. ML will not change that.

     

    The MBA I tested 10.8.2 did not change SMC, it remained at 2.5ft. Yet clearly 10.8.2 had an effect.

     

    To clarify, what I've been saying is that if a MacBook has the Power Nap feature the SMC was absolutely updated.  Power Nap is part of SMC 1.6 and 1.7.  However the proprietary version number for a particular machine (1.7fb2 for instance) did not necessarily change.  Here is Apple's download page with the SMC updates that adds Power Nap to the various versions of MacBooks:  http://support.apple.com/kb/HT5394

     

    As you point out, the most recent SMC update added the Power Nap feature for Late 2010 MacBook Airs (including mine), however the actual version number, 1.67f9, never changed. 

     

    So any MacBook that gained the Power Nap feature incurred an SMC update.

  • salty777 Level 3 Level 3 (540 points)
    Currently Being Moderated
    Sep 22, 2012 10:00 AM (in response to starrc)

    I followed the instructions but have no idea if it reset or not..... it seems a bit weird to press all the keys when the machine is off, then let go, then press power. It just looked like a normal start up to me.... have I done something wrong???

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