At the 2007 Korea Eletronics Show, Samsung Electro-Mechanics announced that it has developed a micro-fuel cell and hydrogen generator that runs on water, which, by 2010 will be used to power cell phones (for 10 hours - twice as long as rechargeable batteries). Eventually, the goal is to develop hydrogen cartridges that only need to be filled with water rather than replaced every few days.

Via Digital Chosunilbo, by way of textually.org.