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  1. #1


    Member Since
    Jan 20, 2009
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    West Chester, PA
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    75
    Specs:
    IMac 21.5'' 3.06ghz, Mac Pro 2.66ghzx4, Powermac G4 1.25ghz, IMac 17'' 1.8ghz
    13" Macbook runs slow on battery, Runs fast on power
    I have a 13" 2010 2.4ghz Macbook Pro. When it is on battery, the type lags behind, the mouse is a little jumpy, and internet and applications are noticeably slower. When it is plugged in, it is at least a hundred times faster and operates very smooth and fast. I have already messed around with the sliders in the Energy Saver preferences. What is the problem?

  2. #2


    Member Since
    Jan 03, 2012
    Posts
    154
    Specs:
    MacBook Pro 2011 2.4GHZ 4GB Ram 500GB HD
    That can happen due to a defective power cord because they give out a certain voltage to your macbook pro. It could not be giving your MBP not enough power so that is whats happening. Try plugging it into a different outlet and if that dosnt work buy a new power cord and that should solve your problem.

  3. #3


    Member Since
    Jan 20, 2009
    Location
    West Chester, PA
    Posts
    75
    Specs:
    IMac 21.5'' 3.06ghz, Mac Pro 2.66ghzx4, Powermac G4 1.25ghz, IMac 17'' 1.8ghz
    Why is that? My Mac says it has 100% battery. My mac isn't lagging behind when it is plugged in, but when it is running solely on battery power.

  4. #4


    Member Since
    Jan 03, 2012
    Posts
    154
    Specs:
    MacBook Pro 2011 2.4GHZ 4GB Ram 500GB HD
    O i see in that case the battery would be defective.

  5. #5

    19birel's Avatar
    Member Since
    Nov 02, 2011
    Location
    Pennsylvania
    Posts
    225
    Specs:
    Late 2011 13" MBP 2.4 GHz i5 16gb RAM, Early 2008 Mac Pro 2.8Ghz 8-Core Xeon 6gb RAM OSX 10.9.x
    Does your battery have a lot of cycles on it? If so then soemtimes the mac will underclock the processor when the battery is in poor health to preserve battery life.

  6. #6

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
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    34,478
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by askclifford View Post
    I have a 13" 2010 2.4ghz Macbook Pro. When it is on battery, the type lags behind, the mouse is a little jumpy, and internet and applications are noticeably slower. When it is plugged in, it is at least a hundred times faster and operates very smooth and fast. I have already messed around with the sliders in the Energy Saver preferences. What is the problem?
    Have you tried resetting the "SMC"?:
    Intel-based Macs: Resetting the System Management Controller (SMC)

    If this doesn't fix things...you could also try resetting the PRAM:
    Resetting your Mac's PRAM and NVRAM

    And also try "repairing permissions":
    Repairing Permissions - Mac Guides

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  7. #7


    Member Since
    Jan 20, 2009
    Location
    West Chester, PA
    Posts
    75
    Specs:
    IMac 21.5'' 3.06ghz, Mac Pro 2.66ghzx4, Powermac G4 1.25ghz, IMac 17'' 1.8ghz
    I reset everything Pigoo3 instructed, but still no luck.
    I am not sure though if I reset the SMC properly, because the light did not change color.

    I took screenshots of the mac while plugged in and while running solely on battery.

    Battery

    Plugged In


    Notice the numbers for Idle and System.

    Thanks for all your help so far!
    Will

  8. #8

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    34,478
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Any chance you still have Applecare remaining on this computer?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #9


    Member Since
    Jan 20, 2009
    Location
    West Chester, PA
    Posts
    75
    Specs:
    IMac 21.5'' 3.06ghz, Mac Pro 2.66ghzx4, Powermac G4 1.25ghz, IMac 17'' 1.8ghz
    No, unfortunately not. I will take it to the genius bar anyways though.

  10. #10

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    34,478
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by askclifford View Post
    No, unfortunately not. I will take it to the genius bar anyways though.
    It's possible that you have a defective battery...and on the 2010 MacBook Pro's (if I remember correctly)...have the non-user replaceable battery.

    With a newer MacBook Pro like this...with low battery cycle count...you really shouldn't be having this problem. I would definitely go to the Apple Store & have them check it out...and if you're lucky...they may replace the battery for free (assuming the battery is the problem)...even without Applecare. since this sort of thing really shouldn't be happening.

    If you go to the Apple Store...please let us know how things turn out.

    Thanks,

    - Nick

    p.s. When you go to the Apple Store...be nice...they're more likely to "do you a favor" if you're nice. Just mentioning this...since some folks go to the Apple Store roaring & growling like a bear...making all sorts of demands...and that many times doesn't work.
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

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