MBA battery sucks so I'm testing it!

Discussion in 'MacBook Air' started by petrucci666, Sep 16, 2011.

  1. petrucci666 macrumors 6502a

    Joined:
    Apr 30, 2009
    Location:
    San Francisco, CA
    #1
    I just unplugged my MBA, it was 100% fully charged.

    I'm gonna follow Apple's guidelines to getting 'optimal' battery life i.e. 7 hours

    So:

    Safari, Mail, Pages, iTunes and Adobe Reader are open.
    Nothing is being downloaded/uploaded nor is there any other program running.

    As I'm typing this, the battery is already down to 97% with 3:04 left but I doubt it'll even make it that far.

    I've had the MBA for over a month now so all the indexing should've already been take care of and the battery indicator should be accurate now.


    If it doesn't make it to at least 6 hours, I am taking it back to Apple and getting a replacement because this is ridiculous!
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Your battery life is dependent on many factors, including screen brightness, WiFi, Bluetooth, Flash on websites, browser extensions, apps/widgets/processes running, etc. When people say "nothing else running", many times they forget about processes they may have running. Launch Activity Monitor and change "My Processes" at the top to "All Processes". Then look to see what processes are running.

    This should answer most, if not all, of your battery questions:
     
  3. toi macrumors member

    Joined:
    Jul 21, 2011
    #3
    what if u keep replacing and replacing and they all last the same time?
     
  4. bill-p macrumors 65816

    Joined:
    Jul 23, 2011
    #4
    Is this the 13" or 11" Air?
     
  5. bursthead macrumors 6502

    bursthead

    Joined:
    Apr 9, 2010
    #5
    You should add the link to your sig...:p It will save you a lot of time...
     
  6. petrucci666 thread starter macrumors 6502a

    Joined:
    Apr 30, 2009
    Location:
    San Francisco, CA
    #6

    You're right. I did forget to mention that Bluetooth was off, flash wasn't running, no browser extensions installed.

    It's the 13" base model.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    I'd still look at Activity Monitor to see what all you have running.
     
  8. rkahl macrumors 65816

    Joined:
    Jul 29, 2010
    #8
    Why don't you just plug it in before the 6th hour? Seriously. Outlets are everywhere.
     
  9. echo.park macrumors regular

    echo.park

    Joined:
    Aug 4, 2011
    #9
    LOL

    Open only Safari, brightness at 50% or lower and don't browse to much and you'll get 6-7 hours.

    With all your apps open, it's completely normal that it says 3 hours.


    As I'm typing this, only Safari is opened, brightness at around 50-60% and with like 85% battery it says 6:15 hours left.
     
  10. Thomas Davie macrumors 6502

    Joined:
    Jan 20, 2004
    #10
    After reading this last night, I decided to see what would happen on my 3 day old 13/256/i7. I unplugged the magsafe, and with an external hard drive still connected and active as well as the Superdrive, I was able to rip and compress a DVD. At that point the battery monitor said I had about 35 minutes left; however after a few minutes of regular surfing (wifi obviously still on as well as Bluetooth) it said I had 3 hr 4 min left. Didn't bother to test that. Plugged back in.

    Tonight I think I'll see how many hours of video I can watch on a full charge. Bluetooth and wifi on, screen brightness set to half. Superdrive connected but not active. External hard drive connected and actively used for Time Machine.


    Tom

    (I expect it will get very active mobile use if I get to Europe later this fall, so I am going to test with Skype and FaceTime as well, but not at the moment)
     
  11. Stingray454 macrumors 6502a

    Joined:
    Sep 22, 2009
    #11
    I'm guessing it's because of the screen brightness. Keeping it on max or very high makes the battery last as best half as long as it does on 50% brightness. If I'm ever low on battery (say <1h left) and I need it to last longer, I usually pull the brighness down another notch or two and thereby doubling the time I can use it :)
     
  12. rhinosrcool macrumors 65816

    rhinosrcool

    Joined:
    Sep 5, 2009
    Location:
    MN
    #12
    On my 13" 2011 MBA, last night, I streamed @ 3hrs of video (cbs, abc, and youtube). Surfing added about 11 minutes. So, I got a total of 3hrs 11minutes; my screen brightness was at half, wi-fi on, BT off.
     
  13. echo.park macrumors regular

    echo.park

    Joined:
    Aug 4, 2011
    #13
    Did you use flash? If so 3 hours seems normal to me. Same thing with HTML5 would have give you at least 4,5 to 5 hours.
     
  14. rhinosrcool, Sep 18, 2011
    Last edited: Sep 18, 2011

    rhinosrcool macrumors 65816

    rhinosrcool

    Joined:
    Sep 5, 2009
    Location:
    MN
    #14
    Yes, both cbs and abc use flash.; when possible, I need to get used to using html 5. I agree that this is about normal. Recently, though a little less substantiated test, I got over 5 hrs watching a little video, using Office (excel and word), and surfing with wi-fi and a little higher screen brightness.

    ----------

    Yeah, why do we even need batteries?:rolleyes:
     
  15. maril1111 macrumors 68000

    maril1111

    Joined:
    Mar 14, 2010
    Location:
    Denmark
    #15
    My MBP 13inch 2011 is in repair and i got a temporary MBP 2006 as a replacement with a battery life of 40mins with textedit open and screen brightness on 1 bar. Even though this machine should have a battery life of 4.5h... and the battery only has 194 cycles so 3 hours sounds like a dream :D
     
  16. KohPhiPhi macrumors 6502a

    Joined:
    Feb 9, 2011
    #16
    Under real-world usage (WIFI, surfing the net, emails, text-chatting over skype, etc), I get between 4 and 5 hours with my 2010 13" MBA running at low screen brightness. There is NO CHANCE I could possibly get 7 hours of battery life doing any real-life usage.
     
  17. Thomas Davie macrumors 6502

    Joined:
    Jan 20, 2004
    #17
    Was able to play at least 274 minutes of video (3 complete movies and then I just forgot about it and it died on it's own).

    I had the sound off because I was watching TV and using an MBP to surf. So I expect at least 4.5 hours of battery life under moderate settings (1/2 brightness, bluetooth and wifi on) and heavy usage.

    With very heavy usage (connected to a time machine backup, the superdrive and ripping/converting a DVD) 100-200 minutes.

    I'll try Skype and FaceTime next.

    Tom
     
  18. maclook macrumors 65816

    Joined:
    Nov 2, 2008
    #18
    That's exactly what's going to happen. These people are delusional.

    OP, you're complaining about the battery life a month later. If you weren't happy with it, you should have returned it and decided it wasn't for you. Seriously, what do you think exchanging it will accomplish?
     
  19. ZipZap macrumors 601

    Joined:
    Dec 14, 2007

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