13-Inch 2013 MacBook Air Gets Up to 15 Hours of Battery Life With Mavericks

Discussion in 'MacRumors.com News Discussion' started by MacRumors, Oct 23, 2013.

  1. macrumors bot


    Apr 12, 2001

    In his lengthy and ultra-detailed review of Mavericks, John Siracusa of Ars Technica conducts battery benchmark tests to measure Mavericks' power saving features on both a 2007 MacBook Pro and a 2013 13.3-inch MacBook Air.

    While both systems saw notable battery gains going from Mountain Lion to Mavericks, the 2013 MacBook Air in particular saw impressive improvements of up to 30 percent, lasting for more than 15 hours in some instances.

    For his battery tests, which were conducted using OS X 10.8.5 and the GM build of Mavericks, Siracusa created a light Web browsing and text-editing automation script, including websites that used Flash. In his tests, battery life varied significantly, but provided, on average, an increase of two hours of work time.
    Since its debut at WWDC, Apple has touted the power saving features bundled into Mavericks, poising improved battery life as the keystone of the operating system. Mavericks is designed to cut down on CPU activity using Timer Coalescing, Compressed Memory, and App Nap.

    While Timer Coalescing bundles low-level operations into a single batch action that reduces CPU utilization by up to 72 percent, App Nap cuts down on the power usage of apps that are not running in the foreground, reducing their overall power draw by up to 23 percent. Compressed Memory also works in conjunction with these two features, compacting the least used processes so less time is spent reading and writing virtual memory swap files on disk, which improves power consumption.

    There's also a new power saving feature built directly into Safari, called Power Saver. With Power Saver, Safari intelligently detects plug-in content playing in the margins of a website and pauses it, preserving battery life.

    During Apple's October 22 event, Apple's senior vice president of Software Engineering Craig Federighi also highlighted Mavericks' battery saving capabilities on the new 13-inch MacBook Air, noting that the operating system provides an extra hour of web browsing and an hour and a half of extra video time.

    Mavericks is available for free from the Mac App Store and is a one-step update for all Mac users running OS X Snow Leopard and above. It can be installed on most computers produced after 2007. As of this morning, total Mavericks adoption hovered at approximately seven percent.

    Article Link: 13-Inch 2013 MacBook Air Gets Up to 15 Hours of Battery Life With Mavericks
  2. macrumors 68020


    Mar 17, 2009
    Very nice! 15 hours for a MBA is insanity. Wow.
  3. macrumors 6502a


    Jun 25, 2011
  4. macrumors newbie

    Jul 19, 2013
    I am getting this over the 15 inch retina just because the new retina didn't meet my expectation battery life.
  5. macrumors 6502a


    Jul 15, 2011
  6. macrumors 6502


    Feb 19, 2011
    Thats so crazy!

    I was amazed when my MBA could do 11-12 hours, now it "can do 15"
    Thats boggled my mind.
  7. macrumors 6502


    Feb 8, 2013
    New York
  8. macrumors 68020

    Oct 14, 2011
  9. macrumors 6502a


    Sep 8, 2011
    Wow. The 13" MacBook Air (Mid 2013) is a keeper!
  10. macrumors newbie

    Jun 10, 2010
    My 2007 Macbook Pro battery lasted about 10 minutes on Mountain Lion. Just upgraded to Mavericks, hoping to get a whole half an hour!
  11. macrumors 68040


    Mar 27, 2009
    Seattle, WA
  12. macrumors 6502

    Dec 28, 2001
    Los Angeles, CA
    Wow, that is a big improvement. I can't wait to go back home and update my macs.
  13. macrumors regular

    Dec 13, 2009
    Scranton, PA
    Getting nearly 45 additional minutes of battery time out of a 2007 Macbook Pro is pretty impressive.... And people say Apple doesn't support old hardware!
  14. macrumors regular

    Oct 1, 2013
  15. macrumors member

    Mar 2, 2013
    Under your bed...
  16. macrumors 6502a

    Sep 17, 2012
    How much of an imrpovement did the 2012 15" retina macboks get?


    yes an hour improvement is such a big improveent and loss of a dedicated graphics card LOL
  17. macrumors 604


    Mar 29, 2011
    I love MacBooks. If only Apple would diversify their iPhone lineup as they do their Mac line up.

    Are there any numbers for the 2012 rMBP's?
  18. macrumors 68000


    Mar 7, 2012
    I'm more interested with the 15 inch macbook,
    but still that is crazy good!!!

    wonder if there is any other PC Laptop can match this.
  19. macrumors regular

    Nov 19, 2012
    Mine arrives tomorrow. If it comes anywhere near close to this I will be very pleased.

    Means i don't have to carry a charger with me everywhere which is a great thing.
  20. macrumors 6502

    Aug 27, 2012
    You'll need the extra time too with all the apps that no longer work in Mavericks.
  21. macrumors 6502

    Mar 13, 2007
  22. macrumors 6502a


    Jun 24, 2010
    Chicago and Spooner (when it's not 20 below)
    Wow - I keep trying to convince myself that I don't NEED a new 13" mba, but dang, that is some crazy long battery life. My current 2011 13" base model, with a battery at 81% health, is getting almost 5.5 hours on Mavericks (I was getting just over 3 on ML), which isn't bad, but to almost triple that amount would be fantastic. I could travel without a charger, the same way I do with my iPad now.

    Sort of makes having an iPad with 10 hours of battery life seem a lot less desirable - at least to me it is.
  23. macrumors 6502

    Mar 8, 2010
    My rMBP 2012 is showing 12:30h under battery. It never did that.

    This is just impressive.
  24. macrumors 601


    Sep 15, 2011
    Vilano Beach, FL
    Yeah, that's pretty astounding (I realize there's a notable amount of deviation depending on the exact apps/services running). Even with -20-30%, this is to the point where I could meet a couple of my partners outside the office for an all day-er, and not have to worry about bringing a power supply or being near an outlet.

  25. macrumors 603


    Jan 20, 2010
    How many hours will we get on the new Mac Pro (using a car battery and inverter)? :p

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