Pros: Never needs batteries, can be recharged by sunlight or artificial light Thin (1/3-inch) and easy to move or carry Concave keys make typing more comfortable Officially only supports Windows but also works with Mac OS X Con...

UPDATED.  Logitech‘s Wireless Solar Keyboard is, well, wireless and solar powered.  What more do you need to know?  It will stay charged up for up to 3 months in a dark room and can glean power from indoor lighting. The k...