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    Asus notebook vampire power

    Discussion in 'Asus' started by tjax, Jul 1, 2013.

  1. tjax

    tjax Newbie

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    I was measuring standby power around my home with a power meter, when I noticed that the power brick on my old Asus F3Jr draws 21 watts even when the laptop is turned off. In fact, if I let only the power brick plugged to the mains, disconnected from the laptop, it still draws 21 watts! I tested other power bricks, from an even older IBM laptop and an HP printer, and they registered 0 and 9 watts plugged to the mains with no load. So, why does this one draw so much power when not in use? It's the original power brick that came with the laptop, made by Delta Electronics for Asus, model ADP-90SB (outputs 19V, 4.74A).
     
    tjax, Jul 1, 2013
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  2. tjax

    tjax Newbie

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    My power meter was the culprit. It's not accurate for small loads. After connecting an incandescent light bulb to increase the load, it started giving more accurate readings. More details on Wikipedia. The laptop adapter is fine, it draws close to nothing when off and very little in standby.
     
    tjax, Jul 3, 2013
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  3. nipsen

    nipsen Notebook Ditty

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    Behold, electrophysics!
     
    nipsen, Jul 3, 2013
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