i wrote a post on nixon headphones and watches a couple of weeks ago, in which i sang their praises for their very cool designs. on designboom today, i saw this: the volta watch, which is nixon's first rechargeable solar powered watch.
the semi-transparent dial allows sunlight through to the solar panel below which charges the watch's battery. powerslaves and desk jockeys need not worry, any light source will suffice so your office fluorescence or tanning beds will also be good sources to recharge the watch.
not only is the idea of a solar powered watch cool, but i think it looks amazing aswell. costing between $240 and $270 (different prices for different straps/materials/colours), it is in a similar price range to the other nixon watches. but at least you'll never have to buy new batteries!
link to nixon
link to designboom article