<http://schema.org/about>
"Instead of using more solar cells, or larger ones, this solar cellphone charger works by concentrating sunlight with a 'crystal ball' onto a tiny solar cell."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/solar-technology/concentrating-solar-charger-uses-ball-lens-focus-suns-rays-1cm-square-solar-cell.html>