Can I use 9 cell battery with my Dell studio 14 - Model 1458

I have a Dell Studio 14" laptop with 6 cell battery (model - U597P). Now I started getting the battery not charging when pluged in. My battery is almost dead.

Planning to buy a 9 cell battery.

1) Will my laptop model support 9 cell

2) is my existing 6 cell charger work with 9 cell battery (properly)

3) will the 9 cell battery fit properly in my current laptop model.

4) any other limitation.