An anonymous reader writes "Researchers at the University of Miami and at the Universities of Tokyo and Tohoku, Japan have discovered a spin battery effect. Basically the ability to store energy into the magnetic spin of a material and to later extra that energy as electricity, without a chemical reaction.
This is a potentially "game changing" discovery that could affect battery and other technologies. The researchers have built an actual device has a diameter about that of a human hair that is uses to demonstrate the effect.
See pictures and a longer release at: http://www.eurekalert.org/pub_releases/2009-03/uom-uom_1031109.php"Link to Original Source