Magnetic 'Spin Battery' Announced

[sanman]

Has anybody heard of this concept?

http://www.sciencedaily.com/releases/2009/03/090311162807.htm

Somebody seems to have now actually shown one in practice. A magnetic 'spin battery'.

Can anyone tell me if this thing is supposed to be capable of greater energy storage density than a conventional chemical battery? Is it capable of even having greater energy storage density than a chemical fuel cell?

What kind of energy density should it have, in Wh?

 

[Proton Soup]

no, it's all voodoo to me. a primer on spin would actually be nice.

 

[Phrak]

So far, the lab prototypes hold up for 10 minutes, or so, before self discharging. I think that's what I read...

"We had anticipated the effect, but the device produced a voltage over a hundred times too big and for tens of minutes, rather than for milliseconds as we had expected,"