Follow up from this post, Canon in Japan has recently showed off an EOS KISS Digital N camera (Japan’s equivalent of the US Rebel XT) that runs on a hydrogen fuel cell. However, real end-user products with fuel cell technology still need couple more years before they’re ready, but it’s good to see more and more prototype of them. Before this fuel-cell powered digital camera, there were already a notebook, mobile phone and MP3 player prototype.