Please post your MB power consumption readings (System Profiler> Power>

Discussion in 'MacBook' started by superczar, Nov 15, 2008.

  1. superczar macrumors newbie

    Joined:
    Nov 13, 2008
    #1
    Would really appreciate if some of the new Alu (or old) Macbook owners can post their power draw readings while running on battery

    Mine reads:

    Display (dimmest) with wifi on: -744 mA

    Display (medium) with wifi on: - 789mA

    Display Max with wifi On : - 919mA

    Full set of readings:

    Here is how to get these readings:
    Open System Profiler>Power
    You need to refresh the readings (Command-R) a few seconds after changing the brightness (or any other setting that would change the power draw)


    Reason why I am acting so fussy about these readings is here:
    http://forums.macrumors.com/showthread.php?t=599506

    Now I am trying to assess if the notebook is able to manage the power draw efficiently while running on batteries

    I am in India while this notebook was bought in the US..
    Now even though the notebook is eligible for a DOA, the process is going to be a bit convoluted because it is an international DOA and seems like it may take upto 2-4 weeks :(
     
  2. southerndoc macrumors 65816

    southerndoc

    Joined:
    May 15, 2006
    Location:
    USA
    #2
    Wow, maybe that's why my battery life sucks. -1352... screen at max, WiFi on, Bluetooth off, IR remote off, currently running Safari, Mail, and AOL (older version).
     
  3. Mako5 macrumors regular

    Mako5

    Joined:
    Nov 15, 2008
    #3
    Hmm now I am worried mine says

    Amperage (mA): -923

    at lowest display brightness and wifi on, Bluetooth off
     
  4. priller macrumors regular

    Joined:
    Dec 15, 2007
    #4
    Amperage (mA): -923

    Display lowest, wifi on, white SR macbook.
     
  5. rybka007 macrumors newbie

    Joined:
    Dec 14, 2008
    #5
    For me it's impossible to get under 1200 even with the lowest settings, normally it displays 1500... In that case the problem is the battery or something else?
     
  6. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #6
    It varies with what kind of macbook you have. The older CCFL panels use more power than the newer LED backlit models. Some HD's use more power than others to keep spinning. Some WiFi networks will sap more power than others depending on signal strength.
     
  7. rybka007 macrumors newbie

    Joined:
    Dec 14, 2008
    #7
    I have a new macbook alu, i am sitting 20 centimeters next to the wireless router:) And my macbook lasts at most 3.5 hours. Even though the capacity is 4120...
     
  8. PeterQC macrumors 6502a

    PeterQC

    Joined:
    Jun 30, 2008
    #8
    You also use less mA if you run when you're not plugged in and all the energy saving options are activated. Having Firefox or Safari or any other apps will use a lot more energy, by the way. Photoshop or any pro tool eat a lot of energy, even if they're idling.
     
  9. VSMacOne macrumors 601

    VSMacOne

    Joined:
    Oct 18, 2008
    #9
    If you're sitting so close to the router you might be able to find an outlet, so you can just plug your laptop in :D
    No but seriously, if you're doing intensive stuff 3.5h is not that bad... If you're just browsing and have like 2 tabs open (not youtube or anything intensive) then you need to calibrate your batt or get a new one...
     
  10. King Luis macrumors 6502

    Joined:
    Jul 3, 2008
    #10
    also, the amount of memory, type of video card and cpu all matter.

    people should be giving a full spec list and have the same os/programs running.

    ie: max brightness, wifi on, bt off, ir off and no accessories attached with laptop not plugged in.
    cpu:
    memory:
    hdd:
    video card:
    battery cycles:
     

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