Maybe you could have tried researching this with easily available information like from Apple's iPod touch specifications page and Google. It uses a Li-Polymer battery--there, I've done half of the work for you. Also, it said 300-500 charges before it gets to 75-80% of the original capacity. It would be several times that before it's a "dead battery" as in completely dead.
This kind of assumptive misinformation is what brings on baseless fears and class action lawsuits.