What screwdrivers are needed for the iPhone 4S battery?

I have the pentalobe (I believe that's how you spell it) screwdriver that removes the back plate, but what screwdrivers are used to remove the screws from the inside? Can you tell me the name and sizes?

They come in few verieties.
You'll need either standard small phillips screw driver or specia "pentalobe" screwdriver
Here's detailed instructions:

http://www.ifixit.com/...ery/3141/1

It has the list of needed tools as well.

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