What battery life are you getting on your 2011 MBA?

Discussion in 'MacBook Air' started by amitdoc2b, Jul 28, 2011.

  1. amitdoc2b, Jul 28, 2011
    Last edited: Jul 28, 2011

    amitdoc2b macrumors 6502a

    Joined:
    Feb 25, 2008
    #1
    In a real-world scenario, what type of battery life are you getting doing light tasks like web browsing (mix of any websites including flash-based), writing e-mails, etc?

    Here's mine...

    Screen Size = 13-inch
    Processor = 1.7GHZ i5
    Screen Brightness = 100% (all bars)
    Cycle #= 1
    Battery life = 4 hours, 45 min

    If everyone can post in a similar format, it would be greatly appreciated :D
     
  2. blowabs macrumors member

    Joined:
    May 23, 2010
    Location:
    BK, NYC
    #2
    turn that brightness down to 50%, and cycle it a couple more times, as in the thread not too far down...
     
  3. amitdoc2b thread starter macrumors 6502a

    Joined:
    Feb 25, 2008
    #3
    I think 50% is way too low! The absolute minimum I would work with is 5 bars from max, with 3 bars from max being acceptable, but full brightness optimal. How much of a jump are you getting in battery doing the same tasks at each of those 4 settings (50%, 5 bars below max, 3 bars below max, and full brightness)?
     
  4. blowabs macrumors member

    Joined:
    May 23, 2010
    Location:
    BK, NYC
    #4
    ok...why would you not go to 50%....funny ....I just checked it and it was 2 bars from the left end!!! I will try it now at 50%....
     
  5. 200900273 macrumors newbie

    Joined:
    Jul 19, 2011
    Location:
    Belgium
    #5
    Screen Size = 13-inch
    Processor = 1.7GHZ i5
    Screen Brightness = 50%
    Wi-Fi = ON
    Cycle #= 2
    Battery life = 7 hours, 20 min
    :cool:
     
  6. Ubuntu macrumors 68000

    Ubuntu

    Joined:
    Jul 3, 2005
    Location:
    UK/US
    #6
    Doing mostly Xcode work, browsing, flash content was going onto Restaurant City on FB because my gf wanted to trade stuff and a couple of shows on iPlayer.

    Screen Size = 13-inch
    Processor = 1.7GHZ i5
    Screen Brightness = 100% 13/16 bars
    Cycle #= 1
    Battery life = 6 hours, 19 min according to dashboard widget, turned off sleep as this resets the widget.

    Will post for my 11 inch MBA when it dies, which should be an hour and a half apparently, but its not calibrated.
     
  7. Typswif2fingers, Jul 29, 2011
    Last edited: Jul 29, 2011

    Typswif2fingers macrumors 6502

    Joined:
    Feb 17, 2010
    Location:
    Dubai, UAE
    #7
    13" i7

    I have been using my MBA today pretty much my normal use...Web, mail.. etc... for the last 3 hrs... the battery clock is now saying 2:27 left... (38%).. its keeps going up and down though... interesting... will report in, a bit later...

    ______Edit_____

    Ok.. the MBA just ran out of juice... makes it about 5 hrs..

    I watched some flash and non flash video (I was trying out the Safari and Chrome no-flash extensions recommended on one of the threads here). I also had the screen on all but 1 bars..

    Not sure what to tell you. For me the battery is not the issue as I am not really expecting to use it without power cord that much. This was just a test to have a wee looksie.
     
  8. Ubuntu macrumors 68000

    Ubuntu

    Joined:
    Jul 3, 2005
    Location:
    UK/US
    #8
    On the 11 inch... with little flash content, just the same game on FB for 5 minutes again and one 28 minute episode.

    Screen Size = 11-inch
    Processor = 1.6GHZ i5
    Screen Brightness = 12/16 bars
    Cycle #= 1
    Battery life = 5 hours, 19 min
     
  9. technopimp macrumors 6502a

    Joined:
    Aug 12, 2009
    #9
    I have a 13" i5...last night at home started with 100% charge. Used on the web (no Flash) for 2 1/2 hours...when I closed it was down to 69% battery life. So, I guess that's about right, that would make the "full drain" a little over 7 hours. Still seems short.
     
  10. Pipper99 macrumors 68000

    Pipper99

    Joined:
    Aug 14, 2010
    Location:
    Fort Worth, TX
    #10
    What widget are you using to tell you the usage time between charges? The stuff that I've found only tells me the hours/percentage remaining, charge cycles, and battery health, but my battery seems to be losing about 20% overnight when the Air is completely shut down. I'd like an app/widget that gives me info like my iPhone that shows Usage Time and Standby Time.
     
  11. 3bs macrumors 603

    3bs

    Joined:
    May 20, 2011
    Location:
    Dublin, Ireland
    #11
    Does screen brightness affect battery life significantly?
     
  12. amitdoc2b thread starter macrumors 6502a

    Joined:
    Feb 25, 2008
    #12
    Based on the above posts it looks like it does. I originally tested at full brightness, but am now testing at at 5 bars under the max. I'll let you know how my results differed later today.
     
  13. onthecouchagain macrumors 604

    onthecouchagain

    Joined:
    Mar 29, 2011
    #13
    13 inch
    1.7 GHz
    Brightness: 14/16
    Cycle: 2
    Batt. life: Around 5 to 5.5 hours



    I'm another user who can't use my Air at 50% brightness level. It's not bright at all. The meager battery life is probably the biggest disappointment of my new Air. I'm surprised really. Hopefully a few more cycles and Lion updates will fix this. It's nowhere near 7 hours.
     
  14. VMMan macrumors 6502a

    Joined:
    Mar 29, 2009
    #14
    I haven't done a full charge to full drain timed test, but my 2011 MBA 11" seems like it's usually on course for about 6 hours of battery life

    This is for light web w/o flash, only 1 app running (Safari 1 window but 4-6 tabs), 4 bars of brightness, keyboard lighting off, wifi ON, and Bluetooth OFF.

    My experience is totally consistent with Anand's timed test.
     
  15. Bossx20 macrumors newbie

    Joined:
    Jun 28, 2004
    #15
    Battery on my i5 13 has been terrible thus far. Currently at 52% and has an estimated time of 1:58.

    Only 2 cycles so far.
     
  16. stevenpa macrumors 6502

    Joined:
    Jun 28, 2011
    #16
    7 cycles so far, average 4-5 hours. At work so no breaks, brightness between 5-9 bars depending on the work, Chrome (no videos/ maybe some flash from webpages but not much), Excel, maybe an hour of music or so, two skype calls. What am I doing wrong?

    EDIT: wifi on, bluetooth off, backlit keyboard off. Would slower internet decrease battery life since the MBA has to work harder? When I'm off wifi it predicts about 6 hours.
     
  17. amitdoc2b thread starter macrumors 6502a

    Joined:
    Feb 25, 2008
    #17
    New updates:

    Screen Size = 13-inch
    Processor = 1.7GHZ i5
    Screen Brightness = 5 bars from maximum brightness
    Cycle #= 2
    Battery life = 6 hours, 45 min

    Bluetooth and Wifi were on still. So it appears lowering the brightness 5 bars led to a 2 hour increase in battery life. It is worth noting though that my battery now charges to 98% and 6568 mAh, while previously it was at 99% and 6655 mAh. What's up with that?
     
  18. meaty macrumors member

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    Feb 27, 2011
  19. s.hasan546 macrumors 6502

    Joined:
    Feb 26, 2011
    Location:
    NY
    #19
    Screen Size: 11"
    Processor: i5 1.6
    Screen Brightness: 50% (8 bars)
    Cycles: 5
    Battery Life: 3 hours 10 minutes- watching 480p videos, on Wifi.
    3 hours 55 minutes- Safari w/ 10 tabs in one full screen window, Mail Application w/ 6 email accounts syncing, Calendar Application w/ 4 diff. synced calendars. Minor Excel work with 10 sheets. Wifi and Bluetooth OFF, Using 4G LTE usb modem (Verizon)

    Slightly disappointed though. I might buy the 13" MBA for the better battery and keep the 11" for when I'm flying.
     
  20. hh83917 macrumors 6502

    Joined:
    Jun 30, 2005
    #20
    I believe amitdoc2b just answered that question for you "So it appears lowering the brightness 5 bars led to a 2 hour increase in battery life." :)
     
  21. cityathrt macrumors regular

    Joined:
    Sep 8, 2010
    #21
    From my brand spanking new MBA purchased yesterday:

    Screen Size: 11"
    Processor: i5 1.6
    Screen Brightness: 50% (8 bars)
    Cycles: 1 (from when I bought from store)
    Battery Life: 5 hours, strictly internet browsing. iChat, Mail, Finder, Safari open.

    Screen Brightness: 80%
    Cycles: 2
    Battery Life: 2.5 hours, internet browsing and watching Youtube. iChat, Mail, Finder, Safari, Chrome, and iTunes open.
     
  22. jackyyeow macrumors 6502

    Joined:
    Jul 5, 2011
    #22
    I must say I'm impressed - those 3G/4G USB modem are battery eater!
     
  23. Pipper99, Jul 30, 2011
    Last edited: Jul 30, 2011

    Pipper99 macrumors 68000

    Pipper99

    Joined:
    Aug 14, 2010
    Location:
    Fort Worth, TX
    #23
    13", i7
    Screen Brightness 80%
    Battery cycles 2
    Backing up iphone to itunes
    3 tabs open in safari, no flash running (haven't installed flash): yahoo mail, macrumors, gmail

    2:12 remaining on 81% charge

    I'm going through the battery calibration procedure, so hopefully things will improve.

    At 1:00 pm, 74% charge, 5;12 minutes remaining. I wonder if there is a utility like the iphone's battery indicator that use Usage time?
     
  24. amitdoc2b thread starter macrumors 6502a

    Joined:
    Feb 25, 2008
    #24
    I'm now doing the same test with Bluetooth OFF. So lets see how much this improves the battery. I will report back here in the next 7-8 hours :D
     
  25. blowabs, Jul 31, 2011
    Last edited: Jul 31, 2011

    blowabs macrumors member

    Joined:
    May 23, 2010
    Location:
    BK, NYC
    #25
    How do you measure the life of a battery? I use "coconutBattery" - still can't figure the exact time my battery lasts. Thx a lot.

    edit: battery icon fluctuates between 4 hours to 6 hours????
    edit: now 7hrs 32mins.????;0
     

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