ipod mini battery replacement?

[nikko]

I need to replace the battery in my iPod mini. I know there are kits out there you can buy, but according to this article on CNET you can buy the battery separately if you already have the tools. That is what I would like to do. I am planning on going to Radio Shack and getting the battery there. What battery should I ask for? Thanks in advance for any help you can provide.