Summary: Solar panels are being squeezed in all sorts of places lately, even the brims of baseball hats. SmartPlanet's Sumi Das checks out this solar cap that will never leave you in the dark.
Summary: Solar panels are being squeezed in all sorts of places lately, even the brims of baseball hats. SmartPlanet's Sumi Das checks out this solar cap that will never leave you in the dark.