1 82 83 84 85 86 Previous Next 3,396 Replies Latest reply: Oct 28, 2013 5:38 AM by CT Go to original post Branched to a new discussion.
  • 1,245. Re: Battery life dropped considerably on Mountain Lion.
    stevetlam Level 1 Level 1 (0 points)

    I have the same problem with battery drain out quite fast on my late 2011 macbook pro. I hope there will be a fix on this issue soon.

  • 1,246. Re: Battery life dropped considerably on Mountain Lion.
    __fb Level 1 Level 1 (0 points)

    Dropbox: @richsadams:

    Thanks for doing that – obviously your issue is different. On my MBA 2012 13", the issue is reproducible, the same thing, meaning, I can't run Dropbox anymore without causing ±100% finder CPU if finder windows are open –until reboot.

     

    Having said that – doing away with this (i.e. if I dont' use Dropbox) my battery life is normal, ca. 7-8hrs at 50% screen brightness.

  • 1,247. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    __fb wrote:

     

    Dropbox: @richsadams:

    Thanks for doing that – obviously your issue is different. On my MBA 2012 13", the issue is reproducible, the same thing, meaning, I can't run Dropbox anymore without causing ±100% finder CPU if finder windows are open –until reboot.

     

    Having said that – doing away with this (i.e. if I dont' use Dropbox) my battery life is normal, ca. 7-8hrs at 50% screen brightness.

     

    Understood.  Odd problem though.  Have you tried:

     

    - Resetting Finder (Terminal command: killall Finder)

    - Reset SMC (http://support.apple.com/kb/HT3964)

    - Repairing Disk Permissions (restart and boot into recovery (hold down Option key at reboot) > disk utility > First Aid > Macintosh HD > Repair Permissions)

    - Delete and reinstall Dropbox

     

    Not sure any of those will help, but can't hurt.

     

    Best of luck!

  • 1,248. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    eddyr wrote:

     

    Well folks read a blog/article today that had reports from developers working on 10.8.1 and it was all positive regarding this issue said that the update will increase battery life and percentage/time. Said that one went from 4 hrs of battery time left to 7 hours which is more like it should be. I'll have a look and see if I can find the link again and post it here.

     

    See three posts above yours.

  • 1,249. Re: Battery life dropped considerably on Mountain Lion.
    jessatd75 Level 1 Level 1 (0 points)

    my 2012 13 inch MBA went from 6 working hours at full screen brightness, 8-9 at 70 percent and 10-11 at 50 percent to literally half those numbers. ive tried all the fixes and none of them are successfull. i have access to several other mac portables and the numbers ar similar. i have noticed one common thread though, althought the cpu usage is at the same plave lion was, the ram usage specifically the wired ram usage on all the machines(2008 15 mbp, 2011 13 inch mbp and the 2012 13 inch mba) has doubled and then some. just a thought could this increased ram usage be the culprit? the ram usage is also higher on several of the imac at my work so this appears to me to be a problem with how ML is allocating and releasing ram possible specifically video ram since wired ram is ram that cant be paged to the hdd or ssd. some food for thought. how is my logic tracking? has anyone else noticed a similar jump in your ram usage?

  • 1,250. Re: Battery life dropped considerably on Mountain Lion.
    Beisarius Level 1 Level 1 (0 points)

    Hey Jess,

     

    Just received the new BTO 13 MBA and it does about 6-7 hrs at 50% brightness, drains 900 to 1000 mAmps, exactly what Apple's specs say it should. The 10-11 hrs, if in Lion, seem unusual. The baterry is supposed to be 6700 mAh - milliampere-hour- capacity when new. So it can deliver, theoretically, 6700 miliamps for one full hour. However, with an average drain of 900 to 1100 miliAmps an hour is should be 6-7hours (6700/1000=6.7 hrs) whether in Lion or ML. I cannot imagine Lion asking for 450 or 500 mA an hour, no OS can do that. All this to say that your MBA is working as intended. If it dropped to 3 hours, meaning -1800 to -2000 mAmps per hour, like some readers, then indeed you would have a problem. May want to watch the battery health and make sure it is stable, and your unit is working as advertised. Now, if Apple's fix improves battery lenghth, so be it, but they are not claiming anything above 7 hrs on their MBA web page.

     

    Screen Shot 2012-08-21 at 9.19.12 PM.png

  • 1,251. Re: Battery life dropped considerably on Mountain Lion.
    jt519 Level 2 Level 2 (285 points)

    Well, my MacBookPro5,3 doesn't have Dropbox running, but the battery runs out even when asleep. I fully charged it the other day. I checked the charge the next morning and it dropped down to 90%. Closed the lid, and check it again the next morning, and it was down to 73%. Over 25% drop with the lid closed, and not being used.

     

    And I just opened the laptop after charging over night, and in the time it took to write this, it's dropped from 100% to 97% - all within about 10 minutes.  Thankfully I have my charger handy or I'll run out of power before I finish writing this!

  • 1,252. Re: Battery life dropped considerably on Mountain Lion.
    gpaulo Level 1 Level 1 (0 points)

    I uprgraded to mountain lion and had all the problems identified by most of the community here. I even posted that already. Called apple support in Portugal (they had no info about the problem), but they were 100% efficient.

     

    there has nothing to do with software installed  or  used as posted by most of the community.

     

    solution (worked for to of my macbook pro 13" 2011 with the same problem: battery lasting 2 hours, fan speed high and noisy and very hot baterry):

     

    1 - make backup with time machine

     

    2 - swicth of MBP

     

    3 - switch on pressing alt

     

    4 - go to utility disk and erase it all (same as format)

     

    5 - quit utility disk

     

    6 - intall os X mountain lion (you need I wifi or ethernet connection). from now on you should get even more battery time than with lion (i have 8 hours, and use bluetooth keyboard and mouse, and sugarsync, dropbox googledrive)

     

    7 - plug your time machine disk

     

    8 - use transfer application

     

    9 - select everything less applications and preferences

     

    10 - it will ask you to create a new user

     

    11 - after transfering all your data (DO NOT CHOOSE PREFERENCES AND APPLICATIONS) change to the new user and erase the old one

     

    12 - update software at this point

     

    13 - go to app store and install all the software you had installed

     

    Finally I'm 100% happy with my 2 MBP 13" back to normal again. Thanks to Portugal Apple Support

  • 1,253. Re: Battery life dropped considerably on Mountain Lion.
    NadiaBH Level 1 Level 1 (0 points)

    I Have the same problem, I just downloaded Mountain Lion yesterday, and used my macbook pro 2011 in school. Already after 1,5 hour the batteri was dead, and normally it last for at least 7 hours! I'm so sick of it, I want to cry.

  • 1,254. Re: Battery life dropped considerably on Mountain Lion.
    gpaulo Level 1 Level 1 (0 points)

    NadiaBH,

     

    if you follow my recommendations you'll solve your problem and mountain lion will be perfect

  • 1,255. Re: Battery life dropped considerably on Mountain Lion.
    g8production Level 1 Level 1 (0 points)

    gpaulo wrote:

     

    NadiaBH,

     

    if you follow my recommendations you'll solve your problem and mountain lion will be perfect

    gpaulo this is not a solution!!! I wanna my applications and my preferences.

  • 1,256. Re: Battery life dropped considerably on Mountain Lion.
    gpaulo Level 1 Level 1 (0 points)

    but you can install your applcations back again. if you want your battery life again as it was or better it's the only solution. there are things in preferences during upgrade that is killing battery life.

     

    Worked 100% for my two MBP, so now it's up to you

  • 1,257. Re: Battery life dropped considerably on Mountain Lion.
    tarpus Level 1 Level 1 (0 points)

    I think the battery problem might have something to do with a recent firmware update that was available to Lion users, and included for ML users.

     

    For reference, I bought a new Retina Display (my second one).  The newer Retina shipped with Lion, and the battery life seemed normal.  Then, I installed on of the firmware updates, and the battery life has lessened, a bit.  Still, I won't upgrade to ML, because ML is SLOWER, and the animation is super choppy.

     

    But in so far as isolating the issue, I think it is firmware related.

  • 1,258. Re: Battery life dropped considerably on Mountain Lion.
    richsadams Level 1 Level 1 (70 points)

    gpaulo wrote:

     

    solution (worked for to of my macbook pro 13" 2011 with the same problem: battery lasting 2 hours, fan speed high and noisy and very hot baterry):

    <snip>

     

    Thanks for your post...very interesting.  A number of folks here have tried reinstalling Mountain Lion, with and without a Time Machine backup as well as completely clean installs (scrape and pave) and AFAIK none have said that everything worked normally afterward; all said that the battery problem still existed.

     

    I don't doubt what you're saying and I'm very happy that this worked for you, but I'm wondering why it worked for your MacBook and not anyone else's.  ???

  • 1,259. Re: Battery life dropped considerably on Mountain Lion.
    Beisarius Level 1 Level 1 (0 points)

    It is important to read the posts. Like adams, i also did several  clean installs including manual file transfer and nor applications- and the issues reappeared within a few hrs of use. I recommended clean installs as some apps and user rights did not transfer well and caused permission errors galore...

     

    see my post above ref my new, 1 day macbook air. This machine has no apps other then battery monitor, and am testing it. I can confirm that AFTER I installed the Power Nap firmware (power nap was not avail prior to the firmware), the battery count became a bit erratic. it still drained at -900 mAmps but then, this morning, DING! lost 1% health so down to 97 from 98. Yet am stil on the first cycle.

     

    Clicked a 2 minute video and battery dropped from 6 hrs to 3, yet Apple geniuses claim they get hgours of AV viewing on their Air. So brand new battery, moment I do web video, it slashes in half the life. Am pretty sure i could not watch 4 hours of Flash video.

     

    So two issues: - battery estimate is erratic- jumps with every app. it should have been designed to update and average every 2-5 minutes, not every few seconds. The battery estimate calculation is atrocious.

    - That firmware indeed does some things- but it was done to make your munit work while in sleep. Had the machine off over night with PN disabled.

     

    Power Nap and notification center are disabled. i will need several cycles before advising the Forum if the problem is also on this fresh new BTP MBA. then I might return it to Apple. Tough decision but I when i reach to grab an Apple I am not expecting a lemon.

     

     

     

    Chris

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