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    Asking someone with electrical skills: AC adapter resistance?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by SL2, Nov 14, 2011.

  1. SL2

    SL2 Notebook Deity

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    I need a new charger for a laptop, and have a spare charger.

    The broken laptop charger:

    19 V
    3.9 A
    65 W

    The spare charger:

    18.5 V
    4.9 A
    90 W

    Same plug, same polarity.

    Specifically, this is what makes me uncertain, and I'd like to get a second opinion here.

    1 - In general, how crucial is the value of a chargers resistance? (The link suggests lowering the resistance is ok, which I'd be doing in this case.)

    2 - Given that it has more than enough power, and assuming that the laptop doesn't require a Toshiba charger (no evil Dell-style chip), is it worth trying the charger?
     
    SL2, Nov 14, 2011
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  2. whitrzac

    whitrzac The orange end is cold...

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    Most laptops that use a 19(ish)v power supply will work on anything from 17.5-22v without issue.

    I read the link, but power supplies use a regulated output, internal resistance doesn't mater....
     
    whitrzac, Nov 14, 2011
    #2
  3. ramgen

    ramgen -- Morgan Stanley --

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    Things to consider:

    1- Voltage: +/- 5 % is perfectly ok. Checked.
    2- Amp: New charger >= Old charger. Checked.
    3- Plug/Polarity: Should be the same. Checked.

    You are good to go with the new charger.


    --
     
    ramgen, Nov 14, 2011
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  4. SL2

    SL2 Notebook Deity

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    Thank you, +1 rep for you both.

    I'll go ahead and use it.
     
    SL2, Nov 14, 2011
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