I have made a solar radio from an old solar LED garden light and small radio.


There are detailed instructions on the Instructables site, I tried to paste them here but it didn't work unfortunately.
It cost me nothing to make and should last years, or until the NiMh battery's die.
http://www.instructables.com/id/EUJQKJ6F4E863QW/?ALLSTEPS
I had previously been listening to the radio through my mains powered stereo, which shocked me at how much power it used - 40 watts,(10w on standby!) just to listen to the radio.....
Makes a nice quick project if you have the parts lying around 
Ben.