TLRedhawke said:A number of companies produce batteries for 1-4G iPods, as well as iPod minis. Some of them will also install the battery for a fee. However, having obtained the battery, any competent technician ought to be able to install the battery inside it.
In my experience, the batteries made by Sonnet (http://www.sonnettech.com) are the best quality around, and come quite cheaply.