MacBook Pro (Late 2011) 7-hour battery life?

Discussion in 'MacBook Pro' started by florante, May 2, 2012.

  1. florante, May 2, 2012
    Last edited: May 2, 2012

    florante macrumors newbie

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    May 2, 2012
    #1
    My mom recently bought me a 13-inch MacBook Pro (Lion) from Best Buy for college and it was a thrill after suffering from pc crashes. Now I have read that Apple claims that these MBPs can last up to 7 hours of wifi use. However, my mac has only calculated after full charging, 4 hours (4:17) of usage. Is there any problem? So I was thinking this: 13-inch will get 4 hours, 15-inche will get 6 hours, and 17-inch will get 7 hours of battery life. HELP me. :confused:
     
  2. toothache macrumors member

    Joined:
    Dec 18, 2011
    #2
    up to "5,6,7" hours is under optimal power settings.

    4-5 hours is what I get on my 2011 15 inch but if I do anything beyond web browsing or office apps, I would get somewhere 2-3 hours.

    Depends what you are doing. playing diablo 3 on battery may go for 1-2 hours.

    What i'm trying to say is, it's varies depending on your usage.
     
  3. florante thread starter macrumors newbie

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    May 2, 2012
    #3

    Yes I've tried those settings (50% brightness, safari browsing only, etc) and still get approx. 4 hours. So 7 hours of battery life is a mere joke from Apple? :(
     
  4. toothache macrumors member

    Joined:
    Dec 18, 2011
    #4
    ah don't worry about it just use your macbook.

    you'll forget it within 3 days.
    haha go to bed
     
  5. macbook pro i5 macrumors 65816

    macbook pro i5

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    May 13, 2011
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    New Zealand
    #5
    On snow leopard the battery life was much better I got rid of lion:) and put SL back on,Also I find that normal for a laptop running lion.
     
  6. PAPO macrumors 6502

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    Aug 24, 2009
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    Australia
    #6
    if I strain my eyes (with min brightness) and stick to really light stuff I've hit about 10 hours on my early 2011 on SL but realistically I'll get 4-6 hours, I find that Apple is usually relatively honest when it comes to battery life claims, they are still a bit exaggerated but far more honest than most companies that claim 4 hours but that's only if you leave it on a blank desktop :p
     
  7. throAU macrumors 601

    throAU

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    Feb 13, 2012
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    Perth, Western Australia
    #7
    Depends very much on what you're doing.

    I've had estimates for wifi browsing life on my MBP 15" of 9hr 40 minutes before - on 1/3 screen brightness, keyboard backlight off, no bluetooth, no flash, etc.

    But typically i get nearer 5 hrs or so in reality - if i'm running handbrake to transcode video that will drop to 1 to 1.5 hrs (which i don't generally do on battery of course).

    (mine was pre-installed with Lion, i bought it like 2 weeks before the late 2011 refresh :D)

    Playing mp3s off a network share via wifi does impact battery life quite a bit.
     
  8. parish macrumors 65816

    parish

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    Apr 14, 2009
    Location:
    Wilts., UK
    #8
    This is how Apple tests to get their battery life figures (it's a footnote on the product page):

    Wireless web testing conducted by Apple in October 2011 using preproduction 2.8GHz dual-core Intel Core i7–based 13-inch MacBook Pro units, preproduction 2.4GHz quad-core Intel Core i7–based 15-inch MacBook Pro units, and preproduction 2.4GHz quad-core Intel Core i7–based 17-inch MacBook Pro units. The wireless web test measures battery life by wirelessly browsing 25 popular websites with display brightness set to 50%. Battery life varies by use and configuration. See www.apple.com/batteries for more information.

    What they don't say is which "25 popular websites" :rolleyes:

    Also, your battery life can increase during use. My 2008 MBP - which only realistically gets about 1:30 per charge - often shows only ~1 hour (& 95% battery) left once it's finished booting but that then increases to sometimes as much as 2 hours depending on what I'm doing. The remaining time is only an estimate based on recent usage.
     
  9. mushtama, May 3, 2012
    Last edited: May 3, 2012

    mushtama macrumors member

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    Feb 14, 2012
    #9
    I have an early 2011 13" MBP and I can get around 4-5 hours usually - browsing the web, youtube-ing every now and again, word processing. But if I'm careful I can get the stated 7 hours (still using Snow Leopard). I rarely use battery power these days anyway as I leaved it plugged into the mains. I only use the battery when I'm at the library really.
     
  10. derickdub macrumors 6502

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    Mar 13, 2011
    Location:
    VA
    #10
    Is 4 hours what OS X is calculating or is this what you're actually getting? Have you "calibrated" your battery? With out calibrating it you won't get an accurate reading, it won't affect actual battery life though.

    I've personally seen 7 hours usage on my 2009 13" with just iTunes and text edit running, so Apple is in no way lying about that. Like other said, it's all about what you're doing.
     
  11. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #11
    It's not good for the battery to run on AC power all the time. The battery needs regular use to stay healthy.
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries.
    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.

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

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    Aug 1, 2011
    Location:
    Detroit, MI
    #12
    No, actually. I have the exact same computer as you do, I bought it in October. With a battery health of 99%, i can get 9 hours. HOWEVER. 9 hours is using the computer at 3 notches brightness, no wifi, keyboard backlight high, no bluetooth.. but normally i get about 5-6 hours with almost full screen and no backlight. with wifi browsing no youtube. its really not that bad :)
     
  13. mushtama macrumors member

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    Feb 14, 2012
    #13
    I used to go through 2-3 cycles a day until I started to leave it plugged in. I still do use the battery from time to time as I go to the library 2-3 times a week. I just find it convenient to just leave it plugged in when I'm at home.
     
  14. derickdub macrumors 6502

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    Mar 13, 2011
    Location:
    VA
    #14
    I am the same way, but when ever I'm at home (where I used my MBP 95% of the time) I have it in clamshell mode so it has to stay plugged in. I have 17 cycles on my current battery which was replaced 6 months ago, and the one before that had 27 cycles and was a little over 2 years old. It started expanding inside my MBP though. The genius said he doubted that leaving it plugged in caused that. I don't think leaving it plugged in is really that bad TBH.
     
  15. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #15
    That's fine. 2-3 times a week on battery for a while is plenty of use to keep it healthy.
     
  16. GuitarG20 macrumors 65816

    GuitarG20

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    Jun 3, 2011
    #16
    OP, consider resetting your SMC if your battery isn't performing as optimally as you want.

    Apple: reset SMC

    I always reset my SMC after major updates, and it tends to help battery life.
     
  17. Smork macrumors member

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    Jul 14, 2011
    #17
    Does this apply to newer 2011 macs as well?
     
  18. GuitarG20 macrumors 65816

    GuitarG20

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    Jun 3, 2011
    #18
    I have an early 2011 17" MBP
     
  19. Smork macrumors member

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    Jul 14, 2011
    #19
    thank you. :D
     
  20. bozz2006 macrumors 68030

    bozz2006

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    Aug 24, 2007
    Location:
    Minnesota
    #20
    Lion had a negative effect in my battery life too.
     

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