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  • 2,355. Re: Battery life dropped considerably on Mountain Lion.
    Sulaiman.K Level 1 Level 1 (10 points)

    +1

  • 2,356. Re: Battery life dropped considerably on Mountain Lion.
    jerryx2000 Level 1 Level 1 (0 points)

    I am on Lion 10.7.5 on a MBA 2011. Am downloading SL. Will let you know if the battery life is better after.

  • 2,357. Re: Battery life dropped considerably on Mountain Lion.
    Sulaiman.K Level 1 Level 1 (10 points)

    err Why downgrading to SL? There is no battery life issues on Lion and it looks more better than Mountain Lion.

  • 2,358. Re: Battery life dropped considerably on Mountain Lion.
    asengskie Level 1 Level 1 (0 points)

    i agree with you too.. but unfortunately i already did the update but only because i thought that it will fix the battery issue on 10.8.1 and yes it only becomes worst a nightmare =( wew...

     

     

    yes APPLE please do something about this dont take us for granted... come on help us solve our problem with the battery... =(

  • 2,359. Re: Battery life dropped considerably on Mountain Lion.
    Csound1 Level 8 Level 8 (35,315 points)

    jerryx2000 wrote:

     

    I am on Lion 10.7.5 on a MBA 2011. Am downloading SL. Will let you know if the battery life is better after.

    Where are you downloading SL from?

  • 2,360. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    Dear Sulaiman.K

     

    We all appreciate that your MacBook is suffering from battery issues and that you're trying to help.  However, and with all respect, everything you've posted has been said numerous times before.  Smeeking just isn't helpful.

     

    Please take some time and read through the thread, at least from the last few days, and you'll learn more than you ever wanted to know about the battery issue...what has helped others as well as the causal theories.

     

    So unless you have some sort of new and valuable information please do us all a favor and stop posting every few minutes.  As others have said, we all get a notice every time someone posts on this thread.

     

    TIA!

  • 2,361. Re: Battery life dropped considerably on Mountain Lion.
    HopSwimmer Level 1 Level 1 (0 points)

    After reading these posts, trying everything suggested (except a clean install, which didn't seem to help others) I took my 2012 MBA into the Geniuses at the Apple Store yesterday. He ran a diagnostic program from a network boot and it determined there was fault in the logic board, SD card reader, and battery. He took the machine for repair at depot to be returned to me in 3-5 days.

     

    My story is:

    New MBA, i7 500GB, 8GB RAM delivered 30 June 2012 with Lion. Ran beautifully, delivered 8-9 hrs on the battery.

    Upgraded to Mountain Lion in the first week of the OS release and immediately the battery life went to 2-3 hrs plus the machine seemed to be significantly more sluggish (although not annoying).

    Installed all the ML updates plus the EFI release this past week, no joy.

    Began to poke around the web to see what others were experiencing and discovered many reporting similar problems.

    Took it in yesterday.

     

    I'll report back on what happens next.

  • 2,362. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    What a pain, but glad to hear things are back to normal for you.

     

    FWIW a clean install of ML 10.8.2 (not just an upgrade or combo update) has indeed resolved this issue for a number of others here (including yours truly, more here).

     

    Keep us posted!

  • 2,363. Re: Battery life dropped considerably on Mountain Lion.
    greghei1 Level 1 Level 1 (0 points)

    Sulaiman.K wrote:

     

    So you're telling that we should format the device for each new OS releases? That would be ridiculous.

     

     

    I have lot of important files in the device and some of them wont get in backup even cant be restored this what i'm worried.

     

     

    I guess the first thing I would suggest is that, totally separate from any issues you may be having with ML, you need to come up with a back-up strategy that actually works to protect your important files.  Catastrophic things happen to computers, particularly laptops.  SDD's fail, hardware is stolen, houses/offices burn down, etc.  If you are storing files in a way that they can't be backed up, you need to rethink your approach to how you save your data.

     

    That aside, I'm not sugggesting that everyone needs to reformat their hard drive in order to upgrade an OS.  I'm just telling you what seems to have worked for me, when nothing else worked. 

     

    It's a complete cluster on the part of Apple that I should be in that position, but I had reached the end of the line in terms of incremental solutions, unless I wanted to continue to wait for a fix that may not come for a long time (if at all).  I had an essentially unusable portable laptop, so I was willing to go through the pain of reformatting/reinstalling, and I was fortunate that it worked.

     

    I would suggest the following to you, given where you seem to be, and given that your priority seems to be having a working laptop, and not simply hoping that Apple fixes the problem for you.

     

    1. Figure out how to backup all of your files.
    2. Exhaust all your possible avenues with AppleCare short of reformatting.
    3. Make the decision whether the poor battery life is better or worse than the pain of having to reformat/reinstall.
    4. Decide to live with/wait for update to OS or reformat.
    5. If reformat, hope/pray that it works.

     

    Like I said, no assurances, because (a) I've only been through one battery cycle so don't know if the fix will stick, and (b) it hasn't worked for everyone.

     

    The question is whether you have any good short term alternatives.  I didn't, so I went with the reformat.

  • 2,364. Re: Battery life dropped considerably on Mountain Lion.
    Sulaiman.K Level 1 Level 1 (10 points)

    @ greghei1 Thank you very much for your advise and i have really appreciated it.

     

    I would hope to reformat my hard drive if AppleCare has no plans to resolve this issue than i might accept their discuss and go ahead then format.

     

    Again i may say thank you for your advise and it means lot to me.

     

    @ richsadams

     

    Dear Sulaiman.K

     

    We all appreciate that your MacBook is suffering from battery issues and that you're trying to help.  However, and with all respect, everything you've posted has been said numerous times before.  Smeeking just isn't helpful.

     

    Please take some time and read through the thread, at least from the last few days, and you'll learn more than you ever wanted to know about the battery issue...what has helped others as well as the causal theories.

     

    So unless you have some sort of new and valuable information please do us all a favor and stop posting every few minutes.  As others have said, we all get a notice every time someone posts on this thread.

     

    TIA!

     

     

    Okay Noted.

  • 2,365. Re: Battery life dropped considerably on Mountain Lion.
    Beisarius Level 1 Level 1 (0 points)

    Hei greghei and all upgraders

     

    So based upon your last post, the conclusion should not be that there is something wrong with ML, but rather with upgrading to ML. However, will defer to the posts of users that tried clean installs and had no results.

     

    A clean install is not just some last resort, but also a normal way of optimizing a new OS performance. Most people who post here do it anyway. Ever upgraded to iOS 3, 4, 5, 6? You just did a clean install followed by a backup restore... So if you can do that, may I ask, where is the difficulty in doing it with a macbook? time and a few extra steps are perhaps the biggest handicap.

     

    Junk piles up within any OS, especially when carying over programs optimized for a previous version. Preferences, user preferences, all begin to add up. in the end, a clean install is considered the best way to get anything out of  a new OS. Manual file import is also another tool.

     

    As for users that have no data backup, in the tech world they call it a Darwinian mistake. $ 1000 mistake for magnetic HDDs, unknown what for SSDs..

     

    So when users come and post here having tried nearly everything  we naturally assume that a clean install was also tried. I can assure you that were we to discuss upgrade issues, i can easily point to SNOW LEOPARD and even LION that caused issues when upgrading, and clean install solving it. Remember once, an upgrade, itunes refused to work, and any terminal tweaks or right fiddling did not solve it. Clean install did.

     

    Another point is that not trying a clean install yet blaiming ML lowers the poster's credibility. how could you have tried solving it when missing the last step prior to a full hardware test at a genius bar... Telling us you only did an upgrade yet still have the problem is also telling me you did not contact a qualified Apple tech or did not follow what he must have recommended: doing a clean install. They would do that in store anyway, hence asking to back data. Tell them you do nto want a clean install and they will return the machine with only the basic test.

     

    If you do a clean install, add large programs ie OFFICE, incrementally after a few cycles. Just in case one of them is a major culprit. For students I understand, less time to wait it out..

     

    None of this changes it for those that did clean installs and still have the issue. Contacting Apple Sr care is your best bet.

  • 2,366. Re: Battery life dropped considerably on Mountain Lion.
    greghei1 Level 1 Level 1 (0 points)

    Beisarius wrote:

     

    Hei greghei and all upgraders

     

    So based upon your last post, the conclusion should not be that there is something wrong with ML, but rather with upgrading to ML. However, will defer to the postsof users that tried clean installs and had no results.

     

    Well, when Apple's own documentation tells users to upgrade, and that upgrade process results in less than nominal performance for a user, distinguishing between (a) the OS and (b) the upgrade process with the OS is a distinction without a difference for that user.  Sort of like distinguishing between the OS and the firmware that is installed in connection with the new OS.  Technically, yes, it's different, but as a practical matter they're part and parcel of a package.

     

    Beisarius wrote:

     

     

    A clean install is not just some last resort, but also a normal way of optimizing a new OS performance. Most people who post here do it anyway. Ever upgraded to iOS 3, 4, 5, 6? You just did a clean install followed by a backup restore... So if you can do that, may I ask, where is the difficulty in doing it with a macbook? time and a few extra steps are perhaps the biggest handicap.

     

    See above re: Apple's own documentation.  To answer your question, I have not upgraded to prior versions other than to Lion (which worked fine).  Prior to my family's iMac and this MBA, I've been a pathologically exclusive PC user, and migrated to Apple in part to avoid having these sorts of issues (which actually didn't happen to me when upgrading to XP, Vista or 7 (I did do clean installs for prior "upgrades" dating all the way back to MS-DOS Exec in the 80's)).

     

     

    Beisarius wrote:

     

     

    So when users come and post here having tried nearly everything  we naturally assume that a clean install was also tried. I can assure you that were we to discuss upgrade issues, i can easily point to SNOW LEOPARD and even LION that caused issues when upgrading, and clean install solving it. Remember once, an upgrade, itunes refused to work, and any terminal tweaks or right fiddling did not solve it. Clean install did.

     

    Another point is that not trying a clean install yet blaiming ML lowers the poster's credibility. how could you have tried solving it when missing the last step prior to a full hardware test at a genius bar... Telling us you only did an upgrade yet still have the problem is also telling me you did not contact a qualified Apple tech or did not follow what he must have recommended: doing a clean install. They would do that in store anyway, hence asking to back data. Tell them you do nto want a clean install and they will return the machine with only the basic test.

     

    Sorry, Beisarius, but you know what they say about what happens when you assume...

     

    I have spent >20 hours on the phone, in email correspondence and in person with AppleCare and Genius, and running Apple directed diagnostics.  The engineers directing the AppleCare senior advisor instructed the clean install only as the *last* step, after running diagnostics, removing and reinstalling applications, trying an additional new user and setting up a new partition.  The Genius at the bar ertainly didn't tell me to do a clean install.

     

     

    Beisarius wrote:

     

     

    If you do a clean install, add large programs ie OFFICE, incrementally after a few cycles. Just in case one of them is a major culprit. For students I understand, less time to wait it out..

     

    This, I agree with.

     

    Can we agree, though, that for at least some users who were seeing performance deficiencies, it was not a hardware issue?

  • 2,367. Re: Battery life dropped considerably on Mountain Lion.
    chris_gr Level 1 Level 1 (0 points)

    I am coming back with an interesting note.

    As I posted some days ago, I saw a drastic increase in battery after a clean install which however lasted for only one day. Then for the next 2 days I started having a huge battery drainage.

    I remember Beisarius once told me that what I did (full charging and full discharging) was not the best for my battery. 2 days ago, I plugged it when my MBA was at 40% and battery was draining fast. Next day I realized that it somehow made my battery last longer.

    Yesterday, a big surprise: I saw the health of my late2010 MBA that I use for the last 8 months to go from 91% health (in 166 cycles) going up to 96% in 170 cycles.    

    I do not know if it lasts but thats what I get today : I am now in 27% after 4 hrs and it says 1.30 hrs remaining.

    Means I get sthl like 5:40. I am surfing the net playing some videos using Chrome (seems to have a flash plugin). I have no flash installed, killed the Notifications Center. See below the stats from cocunutbattery

    What I realized is that Safari is using an enourmous amount of RAM sth like 500 MB for 5 tabs open. In the activity monitor ther is this task Safari Web Content. Firefox is using roughly the same amount.

    I do not know if this huge demand of memory is shortening my batery life.

     

    What I advise people with a clean install to do is to let the battery drain to 40-50% and then fully charge it.

    It worked for me.  I do not know if it will be permanent. Note I did not reset the SMC, battery got a better life  magically ;-)   I hope this lasts, I hope my system stays with this 5-5.30 hrs (one less than I had 2 months ago) but this is NO excuse for Apple's behaviour.

     

    This issue has changed my mind on buying a new MBA. I am not saying anything about ios6 and iphone which are really nothing amazing ! And I dont know what Apple would be if Jobs was around (as some people say) but Apple is becoming mainstream and will lose a lot of loyal customers. No doubt Apple will earn more, no attracts only people who want to spend money, to buy a status symbol, not a stable machine!

     

    5:46pm  99%   6:32 remaining time

    7:45  69%   4:28

    8:38  53%   3:08

    9:15  40%   2:34

    9:42  31%   1:34

     

    APPLE THANKS FOR LEAVING US ALONE, WE ARE ALL REALLY DESPERATE!

  • 2,368. Re: Battery life dropped considerably on Mountain Lion.
    eosman Level 1 Level 1 (0 points)

    I installed 10.8.2 and did a SMC reset on my Retina Macbook Pro. I'm at 5h:32m of use and 14h:52m hours of sleep with 4% battery left saying I got 18 min left.

     

    EDIT: I been using chrome for work since 7:30am this morning, did 30 minutes of youtube videos during a break and about 30 minutes worth of VMFusion running Windows 7.

     

    Also after I installed 10.8.2 from 10.8.1 at 100% charge my hours remaining varied  between 6h:30min to 8h:30min. Where before It would be between 5 hours and 6 hours but normally I'd hit 3.5 hours to 4 hours before my battery was dead.

  • 2,369. Re: Battery life dropped considerably on Mountain Lion.
    eosman Level 1 Level 1 (0 points)

    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.