http://www.sciencedaily.com/releases...0311162807.htm
Spin Battery: Physicist Develops Battery Using New Source Of Energy
ScienceDaily (Mar. 12, 2009) — Researchers at the University of Miami and at the Universities of Tokyo and Tohoku, Japan, have been able to prove the existence of a "spin battery," a battery that is "charged" by applying a large magnetic field to nano-magnets in a device called a magnetic tunnel junction (MTJ).