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Battery life dropped considerably on Mountain Lion.

522037 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)
    Currently Being Moderated
    Sep 24, 2012 5:02 PM (in response to eosman)

    I'm at 90% right now with 1h:11min of use and my Macbook Pro says I have 7 hours and 6 minutes left. Sound okay?

     

    I'll see if I can make it to the magic 7 hours tonight.

    It considers to be excellence battery life that you have. 1 hour and 11 minutes in real time use and if it shows 7:06 remaining is like the battery in Mac OS X Lion and it's sounds pretty improved for you.

  • Beisarius Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 24, 2012 5:24 PM (in response to greghei1)

    Hey greghei

     

    Reread my post two days ago. I listed 5 possibilities, and one of them was "Software glitch- 10.8.2 fixes it." Another was hardware, batteries, then the weird MBP issue alternating GPUs. It is evident that whenever 10.8.2 fixes it, then it was software. So i very much agree with you. Just that it is not applicable to everyone posting here.

     

    Those posting and no fix- it can still be software but their model may not have been covered in the update.

     

    And another category: those with a hardware problem, and a possible culprit could be the battery.

     

    Finally, old hardware (2009- early 2010) there may be no culprit per say but ML may not be able to run on those units or their original batteries. or the older batteries go down super fast under the higher initial load of ML.

     

    but regardless, a clean install in this scenario is a wise thing to try. We must try if to isolate a problem.

     

     

     

    Chris

  • Beisarius Level 1 Level 1 (0 points)
    Currently Being Moderated
    Sep 24, 2012 5:38 PM (in response to chris_gr)

    Chris_gr:

     

    Between Safari, firefox and Chrome, notices Safari pretty bad at consumption. however, one should not have to look with a multimeter to figure out which one is draining your system.

     

    if you are getting 5 hours from your current system, 2 years old, and a battery I believe was not cycled properly, I think you are getting very decent time. So were you to put in a new battery, you would notice a good 6 hour performance. Whcih, for your architecture, is amazing.

     

    based on your notes and stats, your machine just works..

     

    As for battery usage, there is an entire science between how it charges, discharges, why it charges faster initially and why it discharges even faster in the lower percentile values. Just follow the rapid charging method and your batteries will always give you awesome life. For example, a battery at 30% providing an output of 1000 mAh, is performing way less efficient than the same battery at 50% provodong 1000mAh. it does not mean never going below 50 %. But if you are playing videos, GPU intensive stuff and you drop below 40%, just plug it in as heat and other factors wear it faster when depleted. It is not a linear equation.

     

    Screen shot 2012-09-24 at 8.34.35 PM.png

     

    Screen shot 2012-09-24 at 8.35.11 PM.pngScreen shot 2012-09-24 at 8.35.20 PM.png

     

    For some users, the very fact of adding ML, with different power demands, on a battery say, 150+ cycles, can easily create a stress factor that would drop its life rapidly.  A new battery should adress the issue.

     

    Of course, my returned MBA with the drain (and 10.8.2 ppeared to have only partially fixed it), was brand new.

     

    Contact Apple if on a new system, and follow their recommendations

  • richsadams Level 1 Level 1 (70 points)

    Chris, I think we're close to being on the same page, just looking at it from different vantage points.  My WAG was that this was an SMC issue way back when and the more I read and investigate the more I'm convinced that it still is.

     

    To be clear and to avoid some confusion...there are three, not two elements in play here.  There is "software", "hardware" and "firmware".   Specifically the SMC firmware update that was originally included with 10.8 and subsequently updated with 10.8.2. 

     

    Folks need to understand what SMC - again, firmware, not software - does:

     

    The System Management Controller (SMC) is responsible for many low-level functions on Intel-based Macs. These functions include:

     

              •          Responding to presses of the power button

              •          Responding to the display lid opening and closing on portable Macs

              •          Battery management

              •          Thermal management

              •          The SMS (Sudden Motion Sensor)

              •          Ambient light sensing

              •          Keyboard backlighting

              •          Status Indicator Light (SIL) management

              •          Battery status indicator lights

              •          Selecting an external (instead of internal) video source for some iMac displays

     

    The SMC is the only common denominator for everything we've been discussing since day one.  It's what the Apple techs immediately asked about when they contacted us and one of the main things Apple asked the developers to look at with 10.8.2 betas.  Batteries didn't fail en-masse, neither did GPUs or logic boards.

     

    OS X 10.8.2 once again adjusted the SMC for MacBooks running Mountain Lion (adding Power Nap to more models).  10.8.2 resolved the battery problems for some completely, partially for others but not at all for yet others.

     

    That's why "downgrading" to an earlier OS doesn't change the battery issue; doing so doesn't change the SMC version which has to be flashed.

     

    So some may be seeing a hardware or software issue coincident with installing Mountain Lion.  Any OS update can trigger or highlight issues that weren't previously apparent.  However the umbrella for the majority of problems being discussed here is the SMC. 

     

    It's natural and easy to confuse an OS update being a problem when the firmware is updated at the same time as it has been with Mountain Lion, twice now.

     

    Based on the outcomes of the most recent updates, both OS 10.8.2 as well as the SMC version this still appears to be an SMC issue.  It also looks to be specific to certain models and in particular components, be they the battery, GPU, etc. and quite possibly the component manufacturer.

     

    An SMC problem easily explains why this issue didn't affect all MacBooks and why Apple hasn't been able to fully resolve this for everyone.  If it boils down to a specific component or components and even who manufactured them, it's certainly a very complicated task to address.

     

    If it is an SMC/component issue it's also still very likely that Apple will be able to ultimately resolve things.  If not, it's going to mean replacing parts or complete laptops.  My money is on further OS/SMC updates but for a few, it may indeed mean repairs or replacements.  Time will only tell.

     

    My two cents.

  • asengskie Calculating status...

    i download coconut battery and found out that my mbp 13" 2.9ghz i7 was 16 weeks old and my battery cycle was already 97 is this normal??? =(

  • lovejam2012 Calculating status...

    Wow .. there's a lot of inputs

     

     

    By the way, guys, I promise I will let you know about after my full charge, how it goes, here is the result

     

    after fully charged, I restarted the computer, and the screen was on 80% brightness, and the time goes on from 4 hours iniitally to become 8:03hr remining ..

     

    and after I move the brightness from 80% down to 4 bars, the battery display WOW 9:03hrs left ... and after I finsh the typing of this post, the battery is sitting at 9:36 hr. however, next click to confirm again ..it gives me a 9:32 hr and suddenly goes down to 9:22 hrs and next minute to be exact, it does back to 9:30, and three minutes later after, it goes up to 9:47hr... INSANELY WONDEFUL ( if that really works

     

    my Mail app is running, my Safari is running, and that is pretty much it, so, ya, we have done so many tests , we really need Apple to give me some idea how they going to help us.

     

    Cheers

    Lovejam

  • brianx87 Level 1 Level 1 (10 points)

    I can make confirmations after my previous posts that I have made a clean install using the recovery partition and have found no improvement what so ever. Battery life is still giving out false readings and the health continues to float in at around 87%-91%. I've been cumulating data from coconut battery for 48hrs now to send to Apple

     

    Not only are the battery problems still hanging around but the memory usage of everything going has doubled to say the least. For Example Safari including WebProcess now uses double its normal usage as well as Growl and Living Earth HD and worse still Hardware Growler is using up to 380mb of memory at times. With the latest update or maybe its just been the firmware update I've seen more performance loss, Disk Utility works slower and Image Mounting time has increased greatly and I'm having trouble with encrypted disks where the password is not being accepted leaving the password access window floating for minutes on end which seems to result in the only solution to be rebooting my mac which then allows me access using the same password, no mistakes!!!

     

    Apple.....em, I don't know what to say. This is the first problem I've had from your end of things and its a pretty damed heavy one

  • brianx87 Level 1 Level 1 (10 points)

    I'll just add the fact that Safari is using 175mb and WebProcess 200-250mb while google homepage is open, nothing more.

  • Beisarius Level 1 Level 1 (0 points)

    SMC plays a role in some scenarios, no doubt. But I will give you two different examples:

     

    - a 2008 Santa Rosa and Penryn I dumped ML on did not chage SMC at all. There has not been a newer SMC for some of these models in 2 years.. reverting back to SL solved the issue

    - MBA 2012 did not change SMC with 10.8.2. I took screen shots before. So even users that reported a resolution, the problem was solved somewhere else

     

    Some users indeed updated their SMC, but I have no idea how it impacted their performance.

     

    And to simplify the problem, if a piece of hardware does not perform because it lacks an apropriate firmware, the problem is still hardware. The hardware does not perform as it should. And, of course, if no firmware update comes, that piece of hardware will never perform as it should.

     

    The problem with this problem is that so many other users have no problems whatsoever. Same SMC. Same configuration. Same design. i cannot comment as to hardware specifically, as multiple suppliers feed into that...

     

    Have they solved the issue with your macbook?

     

     

    Chris

  • richsadams Level 1 Level 1 (70 points)

    Beisarius wrote:

     

    SMC plays a role in some scenarios, no doubt. But I will give you two different examples:

     

    - a 2008 Santa Rosa and Penryn I dumped ML on did not chage SMC at all. There has not been a newer SMC for some of these models in 2 years.. reverting back to SL solved the issue

    - MBA 2012 did not change SMC with 10.8.2. I took screen shots before. So even users that reported a resolution, the problem was solved somewhere else

     

    Some users indeed updated their SMC, but I have no idea how it impacted their performance.

     

    And to simplify the problem, if a piece of hardware does not perform because it lacks an apropriate firmware, the problem is still hardware. The hardware does not perform as it should. And, of course, if no firmware update comes, that piece of hardware will never perform as it should.

     

    The problem with this problem is that so many other users have no problems whatsoever. Same SMC. Same configuration. Same design. i cannot comment as to hardware specifically, as multiple suppliers feed into that...

     

    Have they solved the issue with your macbook?

     

     

    Chris

     

    Having been a dev and without impacting the NDA, I can tell you that the version of SMC that appears in the Hardware Overview of any Mac doesn't change if it's the same core version.  For example if the Hardware Overview shows SMC version 1.7b3f and the core version of SMC 1.7 is updated the Hardware Overview version won't change although the SMC has in fact been updated.  In other words Apple can update SMC 1.7 or 1.6 and the version on the Mac (providing it's 1.7xxx or 1.6xxx will stay the same.  It's confusing, but that's how it works.

     

    If a MacBook has the Power Nap feature the SMC had to be updated, either with 10.8 or 10.8.2.

     

    Agreed otherwise. 

     

    Yes, per my earlier posts, 10.8.2 brought "normal" battery life back to my Late 2010 MacBook Air.  It's not as good as it was previously, but it does meet Apple's specs.  Fingers crossed things will continue to improve with future updates. 

     

    Cheers!

  • jt519 Level 2 Level 2 (285 points)

    Beisarius wrote:

     

    Hey greghei

     

    ...

    Finally, old hardware (2009- early 2010) there may be no culprit per say but ML may not be able to run on those units or their original batteries. or the older batteries go down super fast under the higher initial load of ML.

     

     

    Chris

     

    I may have missed it, but I'd be interested where you found information that states that ML has a higher load than prior OS's. As far as I've seen, looking at usage, it's not using any more than Lion. Comparing my Mid 2009 MBP running ML with my older MBP (MacbookPro2,2), the ML system is actually using LESS CPU.. yet there's much more of a power drain. I'd love to see the documentation stating that ML has more load.

  • AV.kammari Calculating status...

    It seems that 10.8.2 solved my battery problems. I'm getting normal rates now (MBP mid 2010). Maybe little less than with Lion, but I think that's normal with older computers.

  • Cadaceus Calculating status...

    Well, 10.8.2 didn't seem to change anything for my mid-2009 MacBook Pro (approx 3:30 hours of battery life). Except that since the update, I had three cases of my MacBook not starting correctly and displaying a "your computer did not start correctly, press a key to restart" screen right after pressing the power button... this is getting worse and worse...

  • slego Calculating status...

    AV.kammari, how much does you battery show to you when 100% charged?

     

    I have MBP 2010 mid as well, installed 10.8.2 (combo), reset SMC/PRAM and I have only 2 - 2.5 hours just for surfing web (without video watching).

     

    I had confident 3.5-4 hours when I was on Lion...

  • AV.kammari Level 1 Level 1 (35 points)
    Currently Being Moderated
    Sep 25, 2012 3:35 AM (in response to slego)

    ..how much does you battery show to you when 100% charged?

    It shows now about 5-6 hours. With external monitor 2.5-3 hours. Light web surfing. Battery health is 89%.

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