A video game drains my battery even when plugged in!

Discussion in 'MacBook Pro' started by voltare, Sep 13, 2010.

  1. voltare macrumors member

    Joined:
    May 26, 2008
    #1
    Hey Guys. I've been playing Starcraft 2. I played first in Leopard but the performance was no good unless graphics were set to low. Even then, it was only just playable. So I switched to XP. Gameplay on medium graphics is great in XP. I've noticed that even though my Macbbok Pro is plugged in to the wall, it drains the battery. Last night I played so long that the computer shut down after the battery ran out of juice. Anyone know what's going on here?

    Specs: Macbook Pro 2.4, 256MB 9600GT, 2GB of ram (I have 4GB coming in the mail.) Leopard fully updated. Windows XP fully updated. I am plugged into the wall, not a surge protector.

    Anybody else having this issue? The weird thing is I've played plenty of other games with no problems.
     
  2. cluthz macrumors 68040

    cluthz

    Joined:
    Jun 15, 2004
    Location:
    Norway
    #2
    Sure you haven't swapped adapter with a macbook or macbook pro 13 inch?

    The adapter you should have is 85w (4.6A 18.5V), and the Macbook adapter is 60w (don't remember the specs, but should be around 3.3A 18.5V).

    With a Macbook adapter you'll drain the battery on maximum loads.
     
  3. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #3
    When you're doing something intensive such as gaming, the MBP may use more power than what the MagSafe adapter can provide. The CPU is 35W, 9600M GT is 23W, 9400M is 12W (yes, it will draw power even though you used 9600M GT as it has North- and Southbridge in it), few watts for HD and RAM plus the logic board, screen.... Bright backlight seems to draw fairly a lot of power as it directly impacts the battery life when running on battery.
     
  4. voltare thread starter macrumors member

    Joined:
    May 26, 2008
    #4
    Wow. Cluthz, I think you hit the nail on the head. I visited a friend in March and she had a macbook. I think we switched! Output says: 16.5V 3.65A.

    Can anyone with a macbook confirm that these are the output numbers on a macbook adapter?
     
  5. ljx718 macrumors 6502

    Joined:
    Dec 13, 2008
    #5
    If it's connected to a computer it might be that it's not getting enough power from the usb
     
  6. voltare thread starter macrumors member

    Joined:
    May 26, 2008
    #6
    Also, will it hurt her macbook to use the MBP adapter? She lives very far away and I can just pick up an adapter locally.
     
  7. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #7
    It shouldn't. Her MacBook may even charge faster with it
     
  8. EricNau Moderator emeritus

    EricNau

    Joined:
    Apr 27, 2005
    Location:
    San Francisco, CA
    #8
    This does not pose a problem, according to Apple.

    Apple Portables: Troubleshooting MagSafe adapters
    2. the appropriate power adapter for your Apple portable computer. You can use a higher wattage power adapter, but you cannot use one with less wattage without potential operating issues.​
     
  9. voltare thread starter macrumors member

    Joined:
    May 26, 2008
  10. MartyF81 macrumors 6502

    Joined:
    Sep 5, 2010
    Location:
    Chicago IL
    #10
    If your friend is close enough to get to, you might want to try and swap back!

    I just bought a "2nd" Power Adapter to keep at work and they are not cheap. I think it was like $85 + Tax etc...
     
  11. voltare thread starter macrumors member

    Joined:
    May 26, 2008
    #11
    3000 miles :(

    I've been checking out ebay. Most don't have actual pictures of the magsafes they are selling. Just a description that it is used and it will work. That sounded reasonable until I saw this one...

    http://cgi.ebay.com/APPLE-MacBook-P...s_Chargers&hash=item3cb06cf3fe#ht_1065wt_1139

    It says it is an original Apple part. Check out the extension cord part of the picture. Only 2 prongs! This would be a fake, right?

    So I am just going to buy a new one local. I can get it for $79 with no tax.
     
  12. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #12
    That's normal. When running at maximum (even with the 85W adapter) the power adapter cannot supply enough power, the battery is used. I've played games for a day and seen my battery go down 10% plugged in.
     

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