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Fatal flaw with MacBook Pro's?

8384 Views 28 Replies Latest reply: May 21, 2006 7:25 PM by tapezor RSS
  • Randall Schulz Level 3 Level 3 (800 points)
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    May 21, 2006 8:49 AM (in response to Allan Leedy)
    Bad assumption.

    Improving the product removes causes for complaint, you see.

    iMac 20" Core Duo, 2 GB; MacBook Pro 15" 2.0 GHz, 2 GB, Mac OS X (10.4.6)
  • Aaron Bruce Calculating status...
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    May 21, 2006 9:14 AM (in response to Christian Sormarken)
    I'm perhaps a bit of an oddity, but I got my mbp solely to run windows...
    That being said, I tested this 'stuck a 1 ghz without the battery' and I got the same results. I shut down my computer, removed the battery, ran cpuz (which tells me the clock speed) and then fired up two instances of folding@home which quickly get the cpu usage to 100% and waited for the clock speed to jump from 1ghz to 2.16 like it usually does...and I'm still waiting. So this is a valid issue and it certainly needs to be fixed. I just installed that new firmware and such so...yeah.
    MBP 2.16, Mac OS X (10.4.6)
  • Justin Leavens Level 1 Level 1 (55 points)
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    May 21, 2006 9:29 AM (in response to Christian Sormarken)
    I don't know if it's a "fatal" flaw, but I did see that when I removed the battery of my 2.16ghz MBP while maxing out my CPUs with "yes > /dev/null", the speed immediately dropped to 1ghz, and returned immediately to 2.16ghz when I re-inserted the battery.
  • Anthony_01 Calculating status...
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    May 21, 2006 9:35 AM (in response to Justin Leavens)
    This definitely looks like a bug.

    I see no logical rason why having the battery in would be a pre-requisite to getting full CPU speed. Unless of course there is something we all don't know.
  • Cara Calculating status...
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    May 21, 2006 9:43 AM (in response to Christian Sormarken)
    So if I have no intention of running without a battery, I shouldn't worry right?

    In no sense being judgemental, in fact, just curious but why do you run it without a battery? I usually do the initial battery conditioning thing then run off the battery, recharge, run off battery. I'm rather busy now but before starting residency I would recondition every 1-2 months. Eventually the original battery had to be replaced (2 years use) because that was before I realized that I should unplug the computer from AC from time to time (I think I read that here
    667 Powerbook G4, Mac OS X (10.3.9), waiting to buy MBP...any rich folks willing to adopt me?
  • Andrey Tverdokhleb Calculating status...
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    May 21, 2006 10:06 AM (in response to Christian Sormarken)
    Actually there is at least one good reason for using MBP without a battery - in airplanes. As it was discussed in another thread here MBP has 85W adapter and it's overloading airplane's 75W limited DC when you try to work and charge the battery simultaneously. So the only viable solution was to remove the battery (and you'll have to duct tape the magsafe

    Powerbook G4 1Ghz   Mac OS X (10.4.4)  
  • dmcbride Calculating status...
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    May 21, 2006 10:57 AM (in response to Anthony_01)
    Hi Anthony,

    I think the one major point is that with the MBP specifically (and now the MB) - removing the battery even for the weight factor would be 'stupid'. The magsafe, by design, comes off so easily, even a simple bump would kill the system instantly if it had no battery.

    I think the general thought is, (keep in mind, we are only talking MB or MBP here - not other brands) what reason would you have to remove the battery other than to store it in a closet for months?

    Take care,
    MacBook Pro, Mac OS X (10.4.6)
  • Ewen Level 6 Level 6 (11,790 points)
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    May 21, 2006 2:31 PM (in response to David Ceddia)
    With that said, this is an interesting problem and it
    would be cool to see some benchmarks with and without
    the battery in, and see what happens. Surely there
    are a few scientist types out there who wouldn't mind
    pulling the battery out for a few minutes?

    If you check Christian's link you will see there are numbers. As to how scientific they are, like a lot of online sites and comments posted on BBs, probably not that informative in of themselves.
    PowerBook G4 1GHz, iMac G5 2 GHz, MacBook Pro iPod, Nano, Protege Tablet, Mac OS X (10.4.6)
  • Feefer Calculating status...
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    May 21, 2006 5:17 PM (in response to Andrey Tverdokhleb)
    I really don't get why anyone would use a laptop without the battery attached. How silly.... One of the MAJOR advantages to a notebook is the presence of a back-up power source which kicks in automatically when the A/C power goes down. I've saved myself from data loss when working on a laptop when the power went out between "saves". To recreate the approach with a desktop, you'd have to pay alot for a quality UPS.

    But finally, someone (Andrew) has identified a possible scenario where this "flaw" might potentially be a problem (and the general lack of suitable power when flying is more annoying, altough I suppose you could buy two batteries, and maybe run a dedicated battery charger in flight, too).

    But even there, I'm not convinced that the processor dropping speeds is a disadvantage: if you're worried about current draw on an airline power plug/adapter, maybe it's better the unit DOESN'T try to run at full full speed...

    G4 17 1.5GHz Al, Mac OS X (10.4.6)
  • hey underpants Calculating status...
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    May 21, 2006 5:39 PM (in response to Randall Schulz)
    Apple has reduced heat output and extended battery
    life by making the processor speed more adaptive.

    This is fatal to those whose existence is centered
    around complaining about how they’re being screwed by


    iMac 20" Core Duo, 2
    GB; MacBook Pro 15" 2.0 GHz, 2 GB   Mac OS X

    Best post yet
    blueberry ibook, G3 500, 800, G4 800, 20" iMac, MBP 1.83, Mac OS X (10.4.5)
  • Bill DeVille Level 3 Level 3 (805 points)
    Currently Being Moderated
    May 21, 2006 6:30 PM (in response to hey underpants)
    I stand by my original response (second post in this thread).

    From a quality assurance viewpoint, if there's a bug it is that Apple has not modified the OS to send the user a highly visible and continuous message whenever the MBP is being used without a battery:

    WARNING: At any moment you may lose your data! Please insert a charged battery.

    As to the current lack of power adapters for airline flights, I agree that's a problem and I hope MagSafe adapters soon become available. However, although I do make long overseas flights from time to time, I'm always stuck in steerage (tourist) seating and with no choice of carrier. So I've yet to make a flight where a power plug was available to me, anyway. I start with two charged batteries. I'm darned if I'm going to work more than 2 or 3 hours during the flight, and I've got plenty of power to listen to music and doze for several hours in additional flight time, between iTunes and my iPod. I carry a spare set or two of batteries for my noise-cancelling earphones, too.
    PowerMac DC 2.3, 5 GB RAM, 2 500 GB HD, Mac OS X (10.4.6), MacBook Pro 2.0, 2 GB RAM, 7200 rpm 100 GB HD
  • SteveJob\'sMinion Calculating status...
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    May 21, 2006 6:46 PM (in response to Anthony_01)
    You're preaching to the choir buddy. I travel to and from New York, Washington D.C., Seoul, Korea and Tokyo, Japan. And you're definitely right. A notebook is not the only thing people carry when they travel, but when you're lugging around briefcases, luggage... the weight of a laptop battery is nothing.
    17" MBP, Mac OS X (10.4.6)
  • tapezor Calculating status...
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    May 21, 2006 7:25 PM (in response to Feefer)
    Some people have their laptops plugged into battery backups so it is possible to take out the battery and not lose any data. Also for the people that leave their laptop plugged in all the time overcharging the battery CAN OCCUR despite people saying... its cannot happen on newer batteries etc. If you run it on AC all the time with the battery in the sooner your battery will die. Even when you condition it is says in the manual to just leave it charged for like 2 hours or whatever.

    Leaving lithium ion batteries plugged in all the time definately kills the life of them.
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