Laptops, cell phones, electric cars, all battery driven devices... including e-cigs... are driving a lot of research. Here's an OLD post....
http://www.e-cigarette-forum.com/fo...-1800-mah-super-mini-size-few-years-away.html
Hang in there. I give the whole mod market (other than highly customized stuff... like Rolls-Royce e-cigs) a few years of life left. Then, cig-sized 5 volt 1000 mAh batteries will be standard!
The thing is, nanotubes are still not produced on an industrial scale despite claims (since 2008, I believe) from various universities that they have found the way. Still...nothing! And what a money maker that would be!