Dell inspiron 9300 Dock that charges the battery

Hello

I have a Dell Inspiron 9300 whose Power Socket has died, and it doesnt want to charge any more. I was thinking of making it work by fixing it to a Docking station and charge the battery like that, but I realized that there are no ports at the bottom of the laptop that I can hook the dock to.
Is there a product/part somewhere that i can use to make my laptop Dock Friendly and help it charge, My battery is good as it charges well when i put it in other laptops. Any comments and suggestions are very much appreciated.

Thanks