I'm not really sure if that's legit or not, but I've read several articles about teams creating watches that can run and/or charge off body heat.
One of the biggest parts of the hearing aid is the part that holds the battery. If you could somehow eliminate that, then hearing aids could be super, super, super tiny, in addition to saving me the hassle of having to buy batteries -- or worse, being in a situation (like the middle of a date) where it dies on me and I don't have a replacement!
I'm sure this is a pipe dream, but it would be awesome if someone could make it happen.
