http://ces.cnet.com/8301-33375_1-57356553/powertrekk-powers-your-portable-with-pee-or-water/ The Powertrekk system uses sodium silicide cartridges from SiGNa Chemistry, whose execs I met with here, plus the water-based liquid of your choice (tap water, pond water, even urine) to make hydrogen, which the Powertrekk runs through a fuel cell to generate electricity. It’s $200 plus about $4 a cartridge.
