New battery technology coming to new iPods?

After Apple updated the Macbook Pro with new battery technology I think it's only a matter of time before they bring it to their other products. My 2nd Gen Red iPod Nano doesn't have much battery life left and it's only been 1.5 years since I bought it. The new battery process isn't that expensive so why not bring it to the iPod, a smaller product? Whether it'll be silver-zinc batteries or special lithium polymer batteries I know Apple will have them in iPods this year. Can't wait to see it.