|Look on the bottom of the laptop and of the laptop where it shows some of the specs. There's usually a polarity symbol:|
Or you may be able to check its specs in the manual. Most laptop now are positive polarity; that is the outside metal shield of the plug is negative while the inside is positive. If the Dell charger show the same polarity as what the Asus needs then you don't have to worry about that.
But if the wires are cut then you need to use a DC voltmeter to determine which wire from the charger is positive and which is negative. For the cut off plug you'd use an ohmmeter to determine which wire goes to the shield and which connects to the inside of the plug.
OR you can just temporarily connect the plug to the charger one way and then use a DC voltmeter to determine if the polarity is correct. If it's not just switch the connections. When making the connection permanent I slide on some heat shrink tubing and then solder the wires together. let the solder cool and then slide the tubing over the solder and put a match to it so it shrinks tightly over the connection.
The difference in amperage shouldn't be a problem. As long as the voltages are the same--19 v--the additional amperage won't be 'forced' into the laptop. The laptop will take what it needs.
Hey, I just took a close look at the second picture of the charger in your link. It shows it's positive polarity.
message edited by DAVEINCAPS