Battery life on new MacBook Air

Discussion in 'MacBook Air' started by lyngo, Aug 23, 2013.

  1. lyngo macrumors 6502

    Joined:
    Sep 10, 2007
    #1
    Hi there, I recently purchased a 2013 11" MacBook Air with 256GB of hard drive space. I have cycled the battery as one is suppose to on a brand new machine. My question is a real simple one... The first road of battery depletion and recharge was fairly quick probably because of indexing and what not, but the battery seems to be draining really quick.

    At 100% today it only reads that I have about four hours of battery life left. What gives with this? Does the battery life improve a little bit with initial usage? I don't know much about the way these batteries work and operate and maybe someone can give me a quick rundown. I don't need instructions in how to run through a full cycle of battery life on the Mac, only need to understand how these batteries function and their efficiencies.

    Jay
     
  2. polee macrumors 6502a

    polee

    Joined:
    Jul 22, 2008
    #2
    The four hours fluctuates up and down. Mine ranges from 4 hours to 12 hours for a MBA 11 2013. It depends on the tasks that the computer is handling when it gives you an estimate of the remaining battery life. Do not worry too much about this. Just enjoy your computer.
     
  3. chabig macrumors 68040

    Joined:
    Sep 6, 2002
    #3
    Your battery stores a finite amount of energy. The time remaining is just an estimate, which can be improved by calibrating your battery.
     
  4. polee macrumors 6502a

    polee

    Joined:
    Jul 22, 2008
    #4
  5. jadAce macrumors regular

    jadAce

    Joined:
    Aug 10, 2013
    #5
    Great explanation.

    Coming from Windows, I was also a bit concerned when I saw 4-5 hour estimates. But the MBA lasted 13 hours on a full charge with low use (word processing, 2-3 Safari tabs). The battery will not let you down.
     
  6. maxosx macrumors 68020

    Joined:
    Dec 13, 2012
    Location:
    Southern California
    #6
    My 2013 13" MBA only returns about 20% more run time than my equally configured 2012. Upon contacting Apple they requested I show it to a genius for testing. He ran some tests and replaced it. The new one is much better, nearly double the life of the first.
     
  7. ItHurtsWhenIP macrumors 6502

    Joined:
    Aug 20, 2013
    Location:
    'Merica!
    #7
    If you read the link you posted you would see that the Air doesn't require a calibration..
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.

    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
     
  9. newdeal macrumors 68020

    Joined:
    Oct 21, 2009
    #9
    my 13" has better battery life than an iPad. It easily lasts multiple days between charges with my use, most computers I would have to charge every day so I would say the combo of less sleep energy usage and less awake energy usage easily doubles battery life while on and makes an even bigger difference when using the computer normally with sleep and awake cycles
     
  10. Enrico macrumors 6502

    Enrico

    Joined:
    Feb 6, 2007
    Location:
    Milano / Roma
    #10
    How long is the charging time from 0% to 100% for the 13"?
     
  11. jonasdamn macrumors 6502a

    Joined:
    Mar 4, 2013
    #11
    http://forums.macrumors.com/showthread.php?t=1598294
    From 2 to 3 hours, really fast
     
  12. rochow macrumors member

    Joined:
    Aug 20, 2013
    #12
    Mines 7 hrs (not that it's lasted that long yet, I have used it for about 5 hrs and got it down to almost dead). 13 inch i7. 11 has a smaller capacity.

    Anyone know how to track exact uptime? Rather than "well I started using it about 10. Stopped for an hourish" etc
     
  13. Saturn1217 macrumors 6502a

    Joined:
    Apr 28, 2008
    #13
    I actually found an app on the app store that tracks uptime. Its called Battery Logger. It isn't free but I got a $100 gift card as part of my mac purchase so I didn't mind. I'm using it now. It records both time awake and asleep. Right now it says that my MBA (13" version) has been awake for 4hrs and 42min and I'm at 71% battery.

    If you are having issues with battery check your cpu usage. It should be around 95% idle most of the time. Anything less and you'll see the battery life impact. I also find that dimming the display has a rather dramatic impact on battery life. I get eye strain easily from bright lights so I always put my display as low as is comfortable. Right now I'm at 6 clicks from the bottom but I'm also inside and not near a window.
     
  14. lyngo thread starter macrumors 6502

    Joined:
    Sep 10, 2007
    #14
    Still skeptical

    Just a quick update: I have been using my machine for the past few days and getting right around 5-6 hours with screen at about half brightness and mostly using it for surfing around the internet, doing emails, facebook, and writing a couple of documents on Pages.

    Even right now, it says that I will have 2:57 time left on the battery with 48% remaining. This machine is about a week and a half old. Is this normal? I mean, Apple mentions that on the 11" new model that it will get up to 9 hours. I haven't even seen this as I said before my average is about 6 hours. I know surfing around does take battery usage, but I am still wondering if I am not getting the appropriate time out of this for myself.

    - Jay
     
  15. DisplacedMic macrumors 65816

    Joined:
    May 1, 2009
    #15
    how about one of these?
    [​IMG]
     
  16. chabig macrumors 68040

    Joined:
    Sep 6, 2002
    #16
    One thing not mentioned yet...uninstall Flash (if it's there)!
     
  17. elchorizo macrumors member

    Joined:
    Jul 9, 2012
    Location:
    Beaverton, OR
    #17
    This scares me. I'm considering getting a new MBA too, and I would use it almost exactly as you describe. To me, what you describe, is very light usage and should be near the claimed battery life. I mean, no video watching, no encoding, no gaming, if thats not light usage what is?

    Either something is wrong with your machine, or what some people call "light usage" means something very different than what it means to me. I hope you get it sorted out, and keep this thread updated please.
     
  18. lyngo thread starter macrumors 6502

    Joined:
    Sep 10, 2007
    #18
    I do have flash, but it is not actively running as I am not watching any videos. Could this be the cause of it? Does flash run in the background even though it isn't suppose to?

    I mean, for real, what are people getting in terms of real life time with one battery charge? I am really thinking about taking this back and just waiting for an rMBP update. I don't know at this point. I like the 11" portability.

    - Jay
     
  19. DisplacedMic macrumors 65816

    Joined:
    May 1, 2009
    #19
    i'm getting 7 hours no problem on my 11.
     
  20. halledise macrumors 65816

    Joined:
    May 7, 2009
    Location:
    Hamilton Island, Whitsundays, QLD Australia
    #20
    try resetting the SMC - http://support.apple.com/kb/HT3964
     
  21. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #21
    Simply having flash installed isn't going to make a big impact on battery life unless you're actively viewing flash content. You can also restrict what/content place when you visit websites by using ClickToFlash. There are many factors that impact your battery life. See the BATTERY LIFE FROM A CHARGE section of the following link for details, including tips on how to maximize your battery life.
    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
     
  22. MaulRx Suspended

    Joined:
    Aug 27, 2012
    #22
    I'm only a week into my new 13 inch model and haven't seen anywhere near 12 hours of battery life out of it. More like 9ish, which is still good.
     
  23. thefourthpope macrumors 6502a

    thefourthpope

    Joined:
    Sep 8, 2007
    Location:
    DelMarVa
    #23
    Depending on what I'm doing, and on the screen brightness, I get 5-8 hours no problem. I do find the estimate occasionally jumps from 30 minutes to the 8-minute warning, usually when Word and Safari and going.
    2012 11-inch.
     
  24. lobo1978 macrumors 6502

    lobo1978

    Joined:
    Sep 22, 2011
    #24
    Macbook Air 13

    On my machine (i5/8/256) I get +14 hrs (light work). Battery with 3 cycles, capacity 104% (!) ~7500 mAh.

    Light work: Terminal, Textwrangler, mail, Safari (+10 tabs open, no flash - have it only in chrome browser), Word, Excel, Evernote, Scrivener.

    Screen brightness in auto mode.

    Power consumption usually about 3 - 4 W. CPU temp 28 C (22 ambient).
     

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