Zeetron iPhone 3GS Replacement Battery Kit (Includes 7 Piece Opening Tool Kit + Screen Protector + Zeetron Microfiber Cloth)
This is the iPhone 3GS replacement batter. It includes just a Zeetron microfiber cloth. If your battery is running low or does not hold charge this is a great solution. IT comes with a full set of tools, and a screen protector. This is a full do it yourself kit