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Here is a tantalizing piece of news from Japanese newspaper Nihon Keizai Shimbun, reporting that Casio has created a fuel cell that can run up to 20 hours on a single charge (earlier Casio prototype shown here).

To accomplish the feat, Casio reportedly used solid polymer fuel cells, making the device 90% smaller than any of its predecessors. The Casio six-second reformer does its work by extracting hydrogen from ethanol. The company says we'll see a prototype, perhaps powering a notebook PC, within a year.

Notebook PC fuel cell breakthrough promises 20 hour life [The Inquirer]