chipo chika wrote:

>... had no power pack. ...purchased a 4.5A universal power pack. Surprisingly the power pack melted five
>minutes after connecting it to the laptop. My laptop is rated at 6.3A.
>Could the power affect the power pack? 
>
Yes. The power pack was under rated for service to your laptop. I hope 
for your sake the computer is still ok. :-)

>My understanding is that a power pack with a low rating might just take a little bi longer to recharge a
>battery. 
>
No not in this case. The computer needs to have a power pack rated at 
the same output voltage and "A" or amperage that it requires. Higher 
amperage is ok but the voltage must be the same.

>Where does a laptop draw current when the power pack is connected? 
>  
>
The laptop draws current from the power pack when plugged in. The laptop 
also tries to recharge the battery at the same time if needed. The 
biggest draw of current is when the computer is running and charging the 
battery. As the battery becomes charged the draw from the power pack 
will diminish.
 
The mistake was getting to small of a power pack. Get the right rated 
one and hopefully the computer is ok. Good luck.

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