This one’s so under the radar, there’s barely a mention of it on Samsung’s website. But the South Korean electronics giant has been quietly tinkering with a water-based battery for mobile phones since 2007, when the company forecast it would be ready for market in 2010. Yet, nary a whisper about it at the 2011 Consumer Electronics Show.
The technology sounds promisingly green: When the handset is turned on, metal and water in the phone react to produce hydrogen gas, which then reacts with oxygen in the fuel cell to generate power. If they can keep the phone from shorting out from the water, this could be a game-changer.