Early 2011 MBP

Discussion in 'MacBook Pro' started by naxir, Apr 20, 2012.

  1. naxir macrumors newbie

    Joined:
    Apr 15, 2012
    #1
    So, I just purchased an early 2011 MBP. I know, I know, refresh is coming, but my previous laptop died and I needed this for school. Also, I got the 2.2GHz 15" on sale and didn't have to pay any sales tax, so I saved some more money.

    Anyways, I have a question about the battery life. The machine came with Lion and I have upgraded it to 10.7.3. I have also installed gfxCardStatus and put it into integrated only mode. My battery life seems to be much lower than it should be, although I'm not sure if the battery just needs to be used a bit for it to calibrate itself.

    For example, I'm at 87% battery life and it estimates 2 hours remaining (though it jumps down to 1 hour 30 minutes remaining and back up again every few minutes). I am downloading a large file over wifi, bluetooth is turned off, and screen brightness is at 30-40%.

    My question is: Does the battery need to be "broken in" to be calibrated? Or is it possible that something needs to be fixed? I have read that some people reset their SMC and it cleared up issues, though it seems like with a machine that hasn't been out of it's box for 24 hours yet, that shouldn't be necessary. Perhaps there's something I can adjust to increase battery life? In linux/windows, I could have the processor automatically down clock itself to improve battery life on my old netbook, that's probably already happening but I'm not sure where to check.

    This is my first mac and so far it's been a nice experience, I'd just like to figure out how to get closer to the 7 hours advertised battery life.
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    There's your explanation. "Time remaining" is based on usage at that instant.

    No.
     
  3. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #3
    Your battery does not need to be broken in:
    ______________________________________________________
    This should answer most, if not all, of your battery questions:
    Apple Notebook Battery FAQ by GGJstudios
    The F.A.Q. includes the following topics:
    • BATTERY INFORMATION
    • BATTERY LIFE FROM A CHARGE
    • AC POWER
    • CALIBRATION
    • BATTERY LIFESPAN
    • CHECKING STATUS AND HEALTH
    • CHARGING
    • WHAT IS A CYCLE?
    • BATTERIES ARE NOT COVERED
    • BULGING OR SWELLING BATTERY


    ______________________________________________________
     
  4. heisenberg123 macrumors 603

    heisenberg123

    Joined:
    Oct 31, 2010
    Location:
    Hamilton, Ontario
    #4
    yes what he said, if your download was never going to end like it was an endless download it would die in the 2hours quoted, once the download stops and your not doing any processes it could jump back to 4 hours remaining, its all based on your current processes
     
  5. naxir thread starter macrumors newbie

    Joined:
    Apr 15, 2012
    #5
    Ah, I see. Out of curiosity, does heavy wifi usage really hurt the battery life that much?

    Thanks! I'll check into that.
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    No, the built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries. Calibration doesn't affect battery life, anyway. It only makes your readings more accurate.

    Also, your battery charge remaining is a constantly-changing estimate, based on current power demands. 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:
     
  7. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #7
    If you're downloading a large file then yes.
     
  8. naxir thread starter macrumors newbie

    Joined:
    Apr 15, 2012
    #8
    Thanks for all of the quick responses by the way :) I don't think I've ever posted on forums where my questions were answered so quickly.
     

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