run macbook pro without battery???

Discussion in 'MacBook Pro' started by thechidz, Jan 29, 2008.

  1. macrumors 68000

    thechidz

    Joined:
    Jul 25, 2007
    Location:
    New York City
    #1
    since I use my macbook pro primarily as a desktop replacement, is it possible to run it without the battery therefore saving the health of the battery???
     
  2. macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #2
    Yes it will run without battery.

    Laptop will run cooler, due to certain operation not running at full power with battery removed. There is a link on this thread to the info:
    http://forums.macrumors.com/showthread.php?t=414106
     
  3. macrumors 68020

    Joined:
    Dec 6, 2007
    #3
    You can run it, but your processors will be crippled. It's one of the "features" of Apple. The adapter doesn't provide enough power to fully power the laptop without the battery.
     
  4. macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #4
    You can, but it will run at 1GHz.

    As for how it affects battery life, I don't believe it will affect its total life span. You can run off battery every month or so, but even the effect of that is up to debate.

    I've been running mostly in "clamshell" mode, with ACD and BT mouse/keyboard for over 6 months now. I use it on battery every week or two (actually using it portable), then swap the batteries every so often. I think their total life will be the same, though, no matter what I do.
     
  5. macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #5
    That does not mean it's crippled. It's still faster than most laptops out there even when running without battery.
     
  6. macrumors 68000

    iToaster

    Joined:
    May 3, 2007
    Location:
    In front of my MacBook Pro
    #6
    Yeah, it'll run at half speed, but lemme tell you, I don't use my battery a lot, I've only got 23 cycles on mine, it's about 6 months out, and health says 93%. I get the feeling I should calibrate it, but using your battery is a good thing, it keeps it healthy I think.
     
  7. macrumors 68020

    Joined:
    Dec 6, 2007
    #7
    Don't pay so much attention to the battery; it's going to die whether you use it or not. Enjoy it!
    It's not worth running your laptop at 1ghz in order to squeeze a few more cycles out of the battery.
     
  8. macrumors 6502

    aiterum

    Joined:
    Nov 17, 2007
    Location:
    United States
    #8
    its always easy to buy another battery anyway
     
  9. macrumors 68000

    Joined:
    Feb 2, 2007
    Location:
    Ontario Canada
    #9
    What laptop's have you been using?
     
  10. macrumors 68020

    Joined:
    Dec 6, 2007
    #10
    Thank you. The idea that a 1ghz laptop is "still faster than most laptops out there even when running without battery" is laughable.
     
  11. macrumors regular

    Joined:
    Jan 14, 2008
    Location:
    Miami
    #11
    Instead of removing the battery, you should leave it there and run on the battery once in a while to drain it!
     
  12. NKA
    macrumors member

    Joined:
    Jan 15, 2008
    #12
    That's an undelievable design flaw IMHO. You need a battery to run a MBP from the mains or you get penalized. It sounds laughable if it was not true. No wonder the power supplies are so small.

    My current 4 year old laptop has about 2 minutes of battery life, and the battery is only every used once in a blue moon. So to save the battery when I got my MBP, this time I was going to remove it unless I needed it. This sucks big time!!
     
  13. macrumors 6502

    Joined:
    Dec 4, 2007
    #13
    Seriously? Please explain.

    Lemme guess, Magical Steve Jobs Power and the Holy Apple Trinity's powers of superiority over anything made by heathen PC manufacturers, provides more efficient processing power..
     
  14. thread starter macrumors 68000

    thechidz

    Joined:
    Jul 25, 2007
    Location:
    New York City
    #14
    thats what ive been doing... I think I will just keep doing that...

    its just that battery health is already down to 95% after only 20 cycles...
     
  15. macrumors newbie

    Joined:
    Jan 29, 2008
    #15
    I laughed
     
  16. macrumors newbie

    Joined:
    Jan 16, 2008
    Location:
    poland
    #16
    1GHz? Then it has to be software/Mac OS related issue, cause on Bootcamp XP I cant spot any difference (and 2.2/1 is a huuge difference running Crysis). I remove battery cause the fans work less as it seems the whole machine seems to give away heat faster that way.
     
  17. macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #17
    Hardware Monitor and others display the actual clock speed. Both cores are still operating, but at 1GHz (test done on 17" 2.33GHz MBP).
    http://docs.info.apple.com/article.html?artnum=305336

    I'm not familiar with Crysis, but I presume it's more GPU intensive, than CPU. I'm not sure about the effect on GPU performance w/o battery in OS-X.

    I would guess the lower fan speed and less heat are a result of the slower CPU clock [in Windows].
     
  18. macrumors 68020

    Joined:
    Dec 6, 2007
    #18
    Install something like Notebook Hardware Control when you're in XP, and you'll see the speeds. They're throttled down.
     
  19. macrumors 68020

    yippy

    Joined:
    Mar 14, 2004
    Location:
    Chicago, IL
    #19
    That can't be true, the power adapter has to have enough power run the computer at full without help from the batter.

    Think about it, you can charge the battery and use the computer at full speed at the same time. That means that the power adapter CAN supply MORE power than the laptop needs.

    However, I wouldn't run without a battery because it would be playing with fire. If you pull the cord (easy to do with Magsafe) your computer shuts off like a power outage to a desktop. Not my idea of a good way to take care of your computer.
     
  20. macrumors 65816

    skyrider007

    Joined:
    Aug 5, 2007
    Location:
    Bangkok
    #20
    wow, we have exactly the same stats!
     
  21. macrumors 68020

    Joined:
    Dec 6, 2007
    #21
    http://docs.info.apple.com/article.html?artnum=305336

    This isn't something we're just saying; you can see it right @ Apple.
     
  22. macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #22
    It has to do with surge current. The battery acts like a large capacitor. Although the power supply can handle the continuous current requirements of the MBP, there could still be surges (such as harddrive spinup) which could exceed the capabilities of adapter. With the battery installed, it can provide the extra current during those surges.
     
  23. macrumors 68020

    yippy

    Joined:
    Mar 14, 2004
    Location:
    Chicago, IL
    #23
    Oh, I see, it can supply enough for use plus battery but not enough for spikes or if you are drawing as much power as possible (probably need usb and firewire powered things plugged in and a DVD going). So they clock it down to guarantee you won't overdraw even though 99% of the time you won't.
     
  24. macrumors newbie

    Joined:
    Jul 22, 2002
    #24
    Thats exactly what I was going to say. I do like the magsafe connector, but it comes out way to easily.
     
  25. macrumors 6502

    CJRhoades

    Joined:
    Dec 4, 2007
    Location:
    Lafayette, IN
    #25
    Hmmm... If I pulled the battery out of my TiBook, would it also run at half speed? Or is this "feature" only on newer books?
     

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