Samsung has developed a new kind of cell phone battery that's powered by water and is aiming to bring it to market by 2010.
Here's how it works: When the handset is switched on, reaction between metal and water in the phone produce hydrogen gas. This is then channeled to the fuel cell, where it reacts with oxygen in the air to generate power.
Samsung says the new battery could last for up to 10 hours. Based on four hours of use daily on average, the hydrogen cartridge would have to be replaced about every five days.