Very Poor Battery Life on rMBP

Discussion in 'MacBook Pro' started by bbasra, Sep 15, 2012.

  1. bbasra macrumors member

    Joined:
    Jul 4, 2012
    #1
    Hi,

    I've had my rMBP about a month and it came shipped with ML and has all the updates applied.

    I get very poor battery life. Even now with the battery 100% fully charged, it says 4:53 mins remaining.

    I've done :

    1. Battery calibration
    2. Open Terminal:
    Type the following, hit enter after each line:
    cd ~/Library/Preferences/
    rm com.apple.desktop.plist
    killall Dock

    I do use it at 2/3 brightness and surf using google chrome.... :confused:
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    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.

    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.

    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
     
  3. sammyvine macrumors regular

    Joined:
    Aug 12, 2012
    #3
    Does the macbook pro 13' 2012 need calibrating?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    No. Did you read the links I posted?
     
  5. bbasra thread starter macrumors member

    Joined:
    Jul 4, 2012
    #5
    I shall give that a read and see how i get on.

    Battery Information:

    Model Information:
    Serial Number: D862296333UDNMGA3
    Manufacturer: SMP
    Device Name: bq20z451
    Pack Lot Code: 0
    PCB Lot Code: 0
    Firmware Version: 511
    Hardware Revision: 3
    Cell Revision: 1150
    Charge Information:
    Charge Remaining (mAh): 7630
    Fully Charged: No
    Charging: No
    Full Charge Capacity (mAh): 8344
    Health Information:
    Cycle Count: 12
    Condition: Normal
    Battery Installed: Yes
    Amperage (mA): -1435
    Voltage (mV): 11986
     
  6. davidtutu macrumors newbie

    Joined:
    Sep 12, 2012
    #6
    so why do most people on here with the latest macbook calibrate their battery, or is just me?
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    What evidence do you have that most do that? If they do, they're misinformed.
     
  8. jasonbro macrumors regular

    Joined:
    Jul 22, 2011
    #8
    never trust a man that goes by the name "david tutu"
     
  9. Dark Void macrumors 68030

    Dark Void

    Joined:
    Jun 1, 2011
    Location:
    Cimmerian End
    #9
    The number displayed is just an estimate, and also the rMBP is advertised at 7 hours. That is also an estimate and is subjective in terms of factors that actually effect the battery.

    It doesn't seem to be that poor of battery life to me.
     
  10. AppleWarMachine macrumors 6502a

    AppleWarMachine

    Joined:
    Sep 27, 2011
    Location:
    Michigan, US
  11. slirak macrumors newbie

    Joined:
    Sep 6, 2012
    #11
    Actually, there's been a lot of talk about how ML significantly lowered battery life. 10.8.1 seems to have made things a bit better than 10.8, but still far from 10.7.x. Rumor has it that 10.8.2 more or less restores battery life to 10.7.x levels.
     
  12. Spicedham macrumors regular

    Joined:
    Jun 16, 2012
    #12
    That's normal. I get about the same battery life. At 2/3 brightness that's why its draining fast. Although really dim, try test out using it at 1 and you'll realize its the screen that drains it. Don't worry about the battery its fine.
     
  13. Puevlo macrumors 6502a

    Joined:
    Oct 21, 2011
    #13
    The Apple website clearly states that the MacBook Pro Retina has 7 hours of battery. Therefore anything less means it is broken. Or they are lying.
     
  14. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #14
    That is completely false. Try reading the information posted on Apple's site, as well as many threads in this forum. Stop posting misinformation.
     
  15. eric44 macrumors member

    Joined:
    May 18, 2008
    #15
    I was concerned about my rMBP's battery life but had not thought it through.
    I am running 10.8.1 and getting variable battery life, the answer of course was it varies depending on what I have asked it to do!
    The screen brightness makes a huge difference.
    I am sitting here with a window behind me with the auto screen brightness at max. 86% battery - 4 hrs 54 mins mins left.
    If I cover the sensor the brightness drops to 1/3rd and the time left increases to over 6 hrs (after a bit of a wait).
    Seems clear that the screen draws a lot of juice.
     
  16. hexor macrumors 6502

    Joined:
    Nov 26, 2002
    Location:
    Minnesota
  17. Pagga macrumors 6502

    Pagga

    Joined:
    Feb 21, 2009
    Location:
    Closer to the Artic circle than I like to be
    #17
    That´s what I heard as well.

    A possibility, if you can´t wait for 10.8.2, is to tick off the various choises in iCloud. Supposedly, this helps battery time a little. Otherwise I can recommend gfx Grafic Card Status, a little app that let´s you chose the graphics card according to your own needs and wishes.

    :)
    P
     

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