Originally Posted by yellowlt4
With the Dell systems its more than just how much power is needed. The AC adaptor communicates with the BIOS via the center PIN in the connector on the AC plug that connects to the computer. This is how the system determines what AC adaptor is attached. If the BIOS does not recognize the proper 130watt (or larger) adaptor it will not run at full power.
He said it all. This is exactly why you don't see a whole lot of 3rd party power adapters for our machines....