rMBP: I don't get nowhere close to the 7hr battery life

Discussion in 'MacBook Pro' started by sevimli, Sep 5, 2012.

  1. sevimli macrumors 6502a

    Joined:
    Jun 26, 2007
    #1
    Hello everyone,

    On Apple.com it is advertised that I should get ~7hr battery life. I know it is under some particular condition but I am not getting that, not even closer.

    At a full charge I can get 3.5-4hr at max.

    I did run the hardware test, there was nothing wrong.

    Any advice what I can do about it?

    Thank you!
     
  2. charlieegan3 macrumors 68020

    charlieegan3

    Joined:
    Feb 16, 2012
    Location:
    U.K
    #2
    I'm the same (4-5hrs), I think it's normal - sadly.
     
  3. heisenberg123 macrumors 603

    heisenberg123

    Joined:
    Oct 31, 2010
    Location:
    Hamilton, Ontario
    #3
    what are you doing in those 4 hours and what do you have brightness set too?
     
  4. sevimli thread starter macrumors 6502a

    Joined:
    Jun 26, 2007
    #4
    Brightness is set to the middle and I read PDF files and preview fluorescent images during that period, no browsing or playing music...
     
  5. charlieegan3 macrumors 68020

    charlieegan3

    Joined:
    Feb 16, 2012
    Location:
    U.K
    #5
    I have mine just below 1/2 and do fairly basic stuff, no games, media, just browsing and the like - but mine is closer to 6 for that stuff.
     
  6. bill-p macrumors 65816

    Joined:
    Jul 23, 2011
    #6
    Reading PDF files can be very intensive as some PDFs render high resolution images or vector graphics.

    In any case, I can at least assure you that it's possible to get 8 hours or more at 75% brightness by typing up documents, or coding in Xcode, and occasionally pull up the web browser (no Flash) for reference. That's my typical usage. Screen is on all that time, too.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    That's up to 7 hours. It's not a guarantee that you'll get 7 hours. 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/charging questions:
     
  8. 725032 Guest

    725032

    Joined:
    Aug 5, 2012
    #8
    I found on average i got around 4 hours life with normal use
     
  9. sevimli thread starter macrumors 6502a

    Joined:
    Jun 26, 2007
    #9
    Have you tried to contact Apple?
     
  10. 725032 Guest

    725032

    Joined:
    Aug 5, 2012
    #10
    I actually decided to return mine. After a week of use i became very unhappy with all the issues considering its high cost.

    Im going to wait for the 2nd gen.

    I have an air and regular pro so an extra year isnt a problem.

    I just want the high quality like normal. Especially at that price.
     
  11. StuLax18 macrumors 6502

    Joined:
    Jul 21, 2010
    Location:
    Dallas, TX
    #11
    I get less than satisfactory battery life it seems. And don't try and give me that crap about what are you doing or what is your brightness at. When the recent update to ML I didn't really notice any battery improvement.
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    It's not crap; it's fact. Screen brightness is a major factor in battery life, as is your current workload.
     
  13. StuLax18 macrumors 6502

    Joined:
    Jul 21, 2010
    Location:
    Dallas, TX
    #13
    Yeah, so I guess the fact that I keep my screen really low is why my battery life is less than stellar? Like I said, don't give me that crap. :rolleyes:
     
  14. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #14
    If I'm browsing online, checking my email, and doing normal productivity stuff, I can get about 6-7 hours. If I fire up a video or something, then it drops severely to 4-5 hours.
     
  15. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #15
    It's not screen brightness alone. You can refer to facts as crap if you wish, but they're still true. There are specific things that contribute to battery life. Ignoring those facts and just calling them crap isn't the most intelligent way to diagnose your specific battery issues. Rants don't solve problems.
     
  16. iBookG4user macrumors 604

    iBookG4user

    Joined:
    Jun 27, 2006
    Location:
    Seattle, WA
    #16
    If you wish to have an educated discussion about battery life and ways to improve it please realize that GGJ is stating accurate information. If you wish to have an uneducated discussion please continue as normal.
     
  17. StuLax18 macrumors 6502

    Joined:
    Jul 21, 2010
    Location:
    Dallas, TX
    #17
    I don't want to have any discussion about it, I just don't want people telling me that brightness is affecting my battery life. On my MB I always had it on the lowest setting, usually as low as I can go and still see on the rMBP. It's clearly an issue with ML that wasn't fixed with the last update because it seemed much better on Lion.
     
  18. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #18
    Brightness does indeed affect battery life. There are other things that affect it, as well. Simply lowering brightness will not prevent other factors from affecting battery life.
     
  19. dbdynsty25 macrumors regular

    Joined:
    Nov 9, 2008
    Location:
    Thousand Oaks, CA
    #19
    Why are you on a "message board" if you don't want a discussion?
     
  20. StuLax18 macrumors 6502

    Joined:
    Jul 21, 2010
    Location:
    Dallas, TX
    #20
    Because believe it or not you can learn a lot just by reading.
     
  21. StuLax18 macrumors 6502

    Joined:
    Jul 21, 2010
    Location:
    Dallas, TX
    #21
    But if brightness affects battery life, then lowering brightness should increase battery life. I think you're missing my point. I know that if you turn your brightness up the battery is going to have more power drawn from it. Same thing happens if you use more CPU intensive tasks. However, these are not the only two things that will lead to lower battery life. I don't use high brightness, and I don't really use much CPU, but I still get average to below average battery life. That leads me to think there is another issue that is affecting battery life, so the usual blanket statement of "screen brightness and usage will lead to lower battery life" may not always apply.
     
  22. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #22
    If you want to just rant about it, that's up to you. If you genuinely want to look for a solution,
    1. Launch Activity Monitor
    2. Change "My Processes" at the top to "All Processes"
    3. Click on the CPU column heading once or twice, so the arrow points downward (highest values on top).
    4. Click on the System Memory tab at the bottom.
    5. Take a screen shot of the entire Activity Monitor window, then scroll down to see the rest of the list, take another screen shot
    6. Post your screenshots.
     
  23. MacRetina macrumors member

    MacRetina

    Joined:
    Sep 5, 2012
    #23
    If you turn your screen to the lowest brightness setting, you will get a good 7 hours with a full charge.
     
  24. StuLax18 macrumors 6502

    Joined:
    Jul 21, 2010
    Location:
    Dallas, TX
    #24
    Dood, I'm not an idiot. I don't need someone to tell me to check activity monitor. I use about 4-5% CPU, no page outs. There's no obvious reason for my battery life except that something with ML and it hasn't been completely fixed yet given that's a new OS.
     
  25. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #25
    No one called you an idiot, or even suggested that you are. I made a genuine offer to help. You've made it clear that you don't want an answer or resolution to your problem, as it appears you'd rather just complain about it and blindly blame ML without a single bit of factual evidence. Good luck with that. :rolleyes:
     

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