Losing 5% to 6% of battery every 2 hours.

Discussion in 'MacBook Air' started by curtoise, Jun 24, 2013.

  1. curtoise macrumors 6502a

    Apr 19, 2010
    This is an i5/4/256 2013 MBA 11", I'm experiencing a bug where I'll close the lid of the laptop and I'm losing between 5% to 6% every 2 hours that the laptop is sleeping.

    PowerNap is off while on battery.

    Anybody with the same issue?
  2. falconeight Guest


    Apr 6, 2010
    Are you using maverick's?
  3. curtoise thread starter macrumors 6502a

    Apr 19, 2010
    It happens on Mavericks and Mountain Lion, I've tried both.

    Do you know why?
  4. falconeight Guest


    Apr 6, 2010
    People are having problems after installing mavericks with drainage. IF you head over to the OS mac threads they are talking about it.
  5. curtoise thread starter macrumors 6502a

    Apr 19, 2010
    It is not related to Mavericks, it will happen with both OS.
  6. musika macrumors 65816


    Sep 2, 2010
    New York
    I've noticed this, too. Several percentages drop when the lid is closed.
  7. Drew017 macrumors 65816


    May 29, 2011
    East coast, USA
    Are you using time machine? Make sure your MBA isn't backing up on battery power... This can drastically decrease battery life.

  8. curtoise thread starter macrumors 6502a

    Apr 19, 2010
    Last night the computer went to sleep with 38% at 12am, today at 7:30am after the lid was open the reading on the battery was 31% and after a minute jumped to 28% and after 10 minutes to 22%

    I get superb battery life if i do not close the lid overnight but as soon as I do strange things happen.

    When I open the Console, I can se that the computer woke up 2 times at 1am and at 4am to do a lot of different things, caldav sync, thunderbolt check, address book sync, joined wifi etc.

    I just don;t want to put the computer to sleep now as I know that I'll be losing battery, searching on the forums and Apple discussions the majority of users are losing 1% overnight then there is maybe something I'm doing wrong, there is a bug in the latest ML update or the computer is no good.

    I've disabled every possible functionality that will prevent the Mac going to sleep, no time machines, no wake on pan, no Powernap, no shared drivers, no file sharing, no screen sharing, etc.


    I never setup Time Machine on the Air.
  9. ApplNat macrumors member


    May 18, 2013
    Had the same thing happen on my new 13" MBA. Try doing a test and forcing the laptop to sleep before closing the lid and then see if it happens with that (it doesn't on mine). I suspect a faulty sleep function using only the lid closing, but that's just a theory and not an accusation of anything.
  10. curtoise thread starter macrumors 6502a

    Apr 19, 2010
    Thank you, I'm thinking as the computer woke up at almost 4Am (and I went to sleep pass midnight) is that it went to hibernation or standby mode and saved everything to the flash storage and that's where the battery drain will happen but in the Console.app I'm seeing a lot of different activity.

    I'll try your suggestion with forcing sleep and I'll report back.
  11. curtoise thread starter macrumors 6502a

    Apr 19, 2010
    Update on the battery status.

    I've forced the computer to sleep instead of closing the lid at 10:04am with 89% charge.

    I just woke up the laptop at 4:06pm with 88% and after a minute dropped to 85%

    I'm not sure about this, it seems it is doing the same as with the lid closed.
  12. dhy8386 macrumors 6502a

    Aug 13, 2008
    Download Battery Guru from the app store. Will put the current draw in your menu bar which might be helpful to detect if something is drawing a lot of power constantly. FYI, with normal use (browsing, office suite, twitter app) and screen brightness at 75% i am at about 600-700 mAH.
  13. hulk2012 macrumors 6502

    Jul 13, 2012
    Same thing with my late 2012 11" model. Battery drops by 1% every two minutes on ML and Mavericks with minor usage and nothing syncing apart from email app opened. Been at apple store and they basically refused to exchange the battery after they've run a hardware check which was a pass. Not sure what to do next.
  14. AppleMacNerd macrumors regular

    Jan 23, 2013
    United Kingdom
    On macs while sleeping they can lose 1% of battery per hour (24% per day sleeping) this happens quite a lot.
    Yours sleeping 6 hours and loosing 4% is pretty normal now to be honest.
  15. DoctorK4 macrumors regular

    Jan 31, 2011
    Did you use that terminal command to change display/computer sleep behavior? If so, I wonder if could be causing "side-effects."
  16. curtoise thread starter macrumors 6502a

    Apr 19, 2010
    I have not changed anything, this is brand new 11" air
  17. ftaok macrumors 603


    Jan 23, 2002
    East Coast
    I'm having pretty much the same issue with my brand new MBA 13". This has happened twice now.

    Two nights ago, I closed the lid with about 80% left on the battery. The next morning, I go to use it and it seems a little warm. I thought it was odd, but it was sitting in a media cabinet with my DVR (which runs pretty hot) sitting on the shelf above.

    Well, I go to open the lid and it won't turn on. The power button does nothing. I plug it in and after a couple of minutes, I get it to turn on. I did have trouble getting it restarted, though ... it took several tries.

    Then today, I go to use my MBA and it won't turn back on. I know it had about 90% on the battery from last night. Completely drained battery again.

    I'm running 10.8.4 and the only thing that I installed that could be suspicious was Any Screen Record Pro to capture screencasts. This app was recommended in the latest issue of AppleMagazine. I did download the GeatdyAudioDevice driver to allow the screen recorder to capture audio. Not sure if this is the culprit.

    I'm gonna do a SMC reset first and see if that helps. In the meantime, does anyone else have success fixing this issue?
  18. daviddth macrumors 6502a


    Jun 29, 2009
    I have the 13" i7 MBA and dont have this issue. I can close the lid for 24hrs and lose a few % at most. Mine has neot been charged for overa week now and when I went to bed last night it was 50% exactly. I just opened it, so thats about 14 hours later and it's 49%.

    I dont turn off - just close the lid and walk away, and when I open the lid I get prompted for a password and it's up and running in seconds, which is why I love the MBA's. The 2011 13" was the same - maybe 5% per day loss when closed.
  19. ftaok macrumors 603


    Jan 23, 2002
    East Coast
    OK, here's an update.

    Tried the SMC reset. Didn't work. Turns out that it's more than just the battery draining on sleep. My MBA doesn't want to restart properly ... the screen shuts off, but it just hangs. I could tell because the caps lock button would stay lit up indefinately.

    When I force a shut-down (holding power for 10 seconds), a subsequent startup leads to an error screen.

    So I read some other threads and someone blamed the latest version of Flash. This sounds right as I had installed Flash accidentally and it seems that these issues happened afterwards. I uninstalled Flash and the problem still persisted.

    I ended up erasing the SSD and re-installing from scratch. Viola! It worked.

    Not really sure what the problem was, but I want to blame Adobe. It could have also been using Migration Assistant to copy over apps from a Snow Leopard Hackintosh.

  20. DarkoDonnie macrumors member


    Jun 18, 2013
    I love blaming abobe for resource problems as much as the next person but the latter sounds more at likely. clean installs always a charm
  21. CountBrass macrumors regular

    Mar 17, 2009
    Would a violin have worked as well, do you think?
  22. ftaok macrumors 603


    Jan 23, 2002
    East Coast
    Yeah, I'm pretty sure that the Migration from Snow Leopard was the culprit. I just like blaming Adobe, MSFT, or Google whenever I get the chance. ;)

    You know what, you're a wise@$$. ;) This whole time, I thought voila was spelled that way. And I took 3 years of French. I have to go back and look at what else I've been wrong about all these years.


    In the end, the problem has been fixed. I went to bed last night with 78% charge. Closed the lid to let it sleep. Woke it up this morning (7 hours later) with 77%.

    Now I have to go through the time consuming task of copying over my iTunes and iPhoto libraries from other computers. I should have bought that Thunderbolt/FW adapter. It's a pain to remove HDDs and stick them in caddies.
  23. DisplacedMic macrumors 65816

    May 1, 2009
    well played.

    OP - I know you checked the console to see what's waking it up but have you checked to be sure in terminal?
    syslog |grep -i "Wake reason"

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