power laptop with different adapter

Asustek computer inc. / F5--22
March 11, 2009 at 06:07:54
Specs: Windows Vista
I forgot the AC adapter cable from the wall outlet 220V to it. I have to stay longer at work, so I found another LCD monitor AC adapter which has the same type of DC output to fit the laptop's.
The only thing is that the laptop's original AC adapter says: 19V, 3.42A, while that of the LCD's: 12V, 4.2A.
Can I undervoltage the laptop?
There is only 33% left.
Thanks

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#1
March 11, 2009 at 07:07:36
i do not reckon i would try it. i am guessing that due to the lower voltage it will try to suck more amps to try to achieve the wattage needed. Watts is the real measure of power. Watts is Volts multiplied by amps. So if the volts is lower you need more amps to get the same result in watts.
I would be worried that the higher amp demand might damage the power supply or laptop power circuit

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#2
March 11, 2009 at 07:30:06
>I would be worried that the higher amp demand might
>damage the power supply or laptop power circuit

I didn't because of that.

65W divided by 12V would give 5.5A whereas it says 3.42A,
so 2A more is big, which is 2000 mA, unless 4.2A from specs is a max limit.

Thanks!


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