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  • 2,385. Re: Battery life dropped considerably on Mountain Lion.
    g8production Level 1 Level 1 (0 points)

    MacBook5,1 unibody alluminium late 2008, ML 10.8.2:

    after 7 hours of stop without megasafe connected, the battery is drained from 100% to 91%.

     

    However, with the 10.8.2 update the battery life is a little better because at 100% of charge i have 3h and 40min of battery life. With the 10.8.1 i had about 2h of battery life.

  • 2,386. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    Cadaceus wrote:

     

    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...

     

    If your MacBook failed to start correctly several times some of your files have been corrupted.  You should perform a clean install.

     

    Be sure you have a full backup (Time Machine or otherwise) and I'd recommend manually restoring files...re-download apps, drag other content in, etc...rather than using a TM backup restoration or migration.  That will ensure that your installation is pristine and not subject to earlier problems.

     

    Let us know how things go.

  • 2,387. Re: Battery life dropped considerably on Mountain Lion.
    taweeskk Level 1 Level 1 (0 points)

    After updating with 10.8.2 Combo, my machine I got about 7 hrs of normal running (mostly Safari for web browsing).

  • 2,388. Re: Battery life dropped considerably on Mountain Lion.
    asagolsem Level 1 Level 1 (0 points)

    just bought a new macbook pro and i'm immediately disappointed with the batterylife. Seems its not only me that faces this problem. m new to os x, suggestions welcome.

  • 2,389. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    asagolsem wrote:

     

    just bought a new macbook pro and i'm immediately disappointed with the batterylife. Seems its not only me that faces this problem. m new to os x, suggestions welcome.

     

    You need to find out exactly what the battery life/specification is (and under what circumstances).  If it's a new MacBook Pro it s/b around 7 hours under normal use, less for videos, etc.  Check Apple's webpage for your model or have a look here:

     

    http://www.everymac.com 

     

    If it's not meeting the spec and you just bought it I would immediately return it to the Apple Store (even if you bought it on line or from another authorized seller) or open a case with Apple Support if there isn't an Apple Store nearby.  They'll take care of you.

     

    Don't waste your time here tinkering with a new machine.  It should work as advertised out of the box.  That's what warranties are for.

     

    FWIW I'd still purchase Apple Care.  Three years coverage is worth it.  Depending on where you live, sometimes you can get it at a discount from Amazon.com, B&H Photo, etc.  You have a year from the date of purchase to buy it, so no rush...but it's a reasonable investment IMHO.

     

    My two cents and hope that helps!

  • 2,390. Re: Battery life dropped considerably on Mountain Lion.
    eddyr Level 1 Level 1 (15 points)

    Has anyone actually had this problem resolved with 10.8.2 ?

    My MacBook Airs are the same and still actually losing charade whil asleep.

    Battery drain the same an still see it drop by percentage points while using. Battery health has slight improvement at 94% after 29 cycles which to me says battery damaged or a lemon. Not very happy Apple. I think I'll be going to Apple store for battery replacement AT THEIR COST.

  • 2,391. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    eddyr wrote:

     

    Has anyone actually had this problem resolved with 10.8.2 ?

     

    Yes, quite a few people.  (Scroll up even a few posts.)  More on my MacBook Air here.

  • 2,392. Re: Battery life dropped considerably on Mountain Lion.
    Sulaiman.K Level 1 Level 1 (10 points)

    @ richsadams How long could you use your MacBook Air in real time when it's on full charged?

     

    Mine after updating to Combo version (on my other MBP it has improved) nothing improved but at the first after the installation it has worked normally, I think i should take MBP to Apple Store before it's too late.

     

    Could you please confirm that the clean install does fixes this issue? – I'm little bit confused and i heard some users are saying that after clean installation nothing has improved with their battery life

     

    Thanks.

  • 2,393. Re: Battery life dropped considerably on Mountain Lion.
    weeasle Level 1 Level 1 (0 points)

    Hello everyone,

     

    I just recently upgraded my late 2010 Macbook Air from SL 10.6.8 to ML 10.8.2 using the App Store upgrade.

     

    I completed the upgrade at work and havent had access to the MBA to use it yet. But after returning to work I will be using/testing it and hope not to be affected by reduced battery life.

     

    Some general comments/observations: I think it would be helpful if posters here make a point of mentioning tge following: Make/Model Mac, upgrade method (combo, app store or fresh install), SMC firmware ver, and in particular: How long after a full cycle can your mac portable go without needing recharge. Specifically, how long in hrs/mins will it run on battery from 100% to sleeping itself from discharged battery? The reason I mention this is while diagnostics and battery stats/percentages csn be helpful, they can also be totaally unreliable as they are only an estimate and can/do fluctuate wildly depending on usage. Also we dont yet know the full impact of ML on 3rd party battery monitoring utils.

     

    Hopefully by sharing just these key info items we may get closer to isolating the cause of the battery life issues for many mac portable owners who have taken the plunge to ML...

     

    Also I noticed after the upgrade power nap didnt show in my energy saver area in sys preferences. Richsadams mentioned the SMC firware gets updated during the upgrade but I suspect this only happens for certain models and the late 2010 MBA is only upgraded through the recently released 1.7 firmware update.

     

    I will confirm my SMC firmware version and observe the battery life with my current firmware rev. and report back here within the next few days.

     

    Thanks,

     

    weeasle

  • 2,394. Re: Battery life dropped considerably on Mountain Lion.
    iinviktus Level 1 Level 1 (0 points)

    My early 2011 MBP is losing 1% a minute on battery power after upgrading to 10.8.2.

  • 2,395. Re: Battery life dropped considerably on Mountain Lion.
    asagolsem Level 1 Level 1 (0 points)

    we don't have apple stores in India, i bought from a reseller. i'll call apple support today. i was readin a lot bout mountain lion and its battery drain so i thought i'll just do a bit more research myself.

  • 2,396. Re: Battery life dropped considerably on Mountain Lion.
    weeasle Level 1 Level 1 (0 points)

    Hello,

     

    Just wondering, Is yours the 13 inch late 2010 MBA or the 11 incher?

     

    I will report back soon with results after tesing/usage (see post below)

     

    Thanks,

     

    weeasle

  • 2,397. Re: Battery life dropped considerably on Mountain Lion.
    adi190 Level 1 Level 1 (0 points)

    My Question simply is, "Is it a worth it upgrade? or should i continue to run my machine on 10.8.1?" In normal circumstances I would not have had a second thought about doing this, but seeing the track record of Apple in the last few months/weeks, i am sceptical abt everything i do.

  • 2,398. Re: Battery life dropped considerably on Mountain Lion.
    jt519 Level 2 Level 2 (285 points)

    Well, I just spent the evening wiping my MBP Mid 2009 and clean installing ML, using the recovery partition. Took almost 3 hours just to install the base OS. I copied all my data over, and reinstalled my application.

     

    I pulled the power plug and so far it's not too bad. I did see the time remaining go up to 7 hours briefly. It's now sitting at 96% and 5:24 remaining. Don't know if it was all worth it, but at least I was able to clean up some cruft that's been left over for a while.

     

    Will report later as the power drains. Interested to see what happens overnight while it's asleep. oops.. dropped down to 95%...

  • 2,399. Re: Battery life dropped considerably on Mountain Lion.
    Sulaiman.K Level 1 Level 1 (10 points)

    My early 2011 MBP is losing 1% a minute on battery power after upgrading to 10.8.2.

    We're all on the same side as you and even mine the same as you and my battery is draining every 1% per minute of use in the real time is 2 to 3 hours only but in the calculator of battery remaining it shows 5 hours sometimes 6 hours (real time use only 3 hours max than 3%).

     

    This issue has been caused major MacBook pros/airs owners not just us and we all still didn't hear any words that mentioning the battery life issue from Apple.