battery-time and cores

Discussion in 'MacBook Pro' started by sir. mac, Nov 21, 2006.

  1. sir. mac macrumors regular

    Joined:
    Nov 21, 2006
    #1
    As I travel extensively battery-life is a big issue for me. So far I´m really pleased with the performance of my 2 week old MBP C2D, which lasts me nearly 4 hours of video (not DVD). I did the battery-calibration and always let it run to empty if I disconnect the power-supply. Anyway, I´ve been trying to monitor the cpu speed with the somewhat unreliable CoreduoTemp, and noticed that it would stay at 2.ghz, even though settings set to "maximum battery life". I don´t know if this reading is correct, but is there a way to throttle down cpu-speed and make it constant at a specific level?

    I also read somewhere that you could manually set the number of active cores (in the devtools?). How then do I set it to only one active core, and would this at all impact battery-time?
     
  2. flalaw macrumors regular

    Joined:
    Aug 11, 2006
    Location:
    United States
    #2
    if you want to maximize your battery life, don't let your battery run to empty every time you use it. your battery has only a set number of charge cycles in its life. so if you run it down lets say 10 percent, then charge it back up, you've only used 1/10th of a charge cycle.

    read this for more info:

    http://www.apple.com/batteries/
     
  3. sir. mac thread starter macrumors regular

    Joined:
    Nov 21, 2006
    #3
    thanks. I remember reading about this, but forgot it!

    But what about the cores?
     
  4. sir. mac thread starter macrumors regular

    Joined:
    Nov 21, 2006
    #4
  5. ChickenSwartz macrumors 6502a

    Joined:
    Jul 27, 2006
    #5
    Any idea how many cycles a MBP's battery can take before it starts to diminish, to let's say, 80% of the original life?
     
  6. sir. mac thread starter macrumors regular

    Joined:
    Nov 21, 2006
    #6
    As I´ve lost 1% after 8 cycles I would say 160 before 80%, but that number seems a bit short.

    Read somewhere that one should let the battery go down to 40% before charging it, as this would be easier on the cycle numbers. After I read it the guide was removed so I don´t know if this was because it´s just wrong or what. The Apple-pages on battery-care doesn´t mention this though.
     

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