You can also use the power supply from a Inspirion 1100. the 5 sided with 3 pins. But make sure you get enough WATTAGE. Best to go with the 90 watts, or the 65 will not charge your battery. And be careful of the IMPORTS- they are not always that good or reliable.
this is the only way to get one that will for sure work, their is a battery shortage right now, wait a month the price will go down. this is directly from dell