An interesting development with non metal battery solutions
http://revolution-green.com/rhubarb-battery-offers-renewable-energy-solution/ (http://revolution-green.com/rhubarb-battery-offers-renewable-energy-solution/)
should be something here for the keen experimenter
Kind Regards
Mark
I think this is the patent: 8,338,055
Avaible from
http://www.pat2pdf.org