This green gadget will shed some light on the subject and put a charge in your cellphone all with sustainable solar power.  The Solar Beam III is both a very bright, 3 LED flashlight (65,000MCD) and cellphone charger in one nifty rechargeable package.  You can charge with one, two or three solar panels open and operate the flashlight with 1, 2, or 3 LEDs to extend your charge.  Fully charged, the 3 LED mode will give you bright light for 15 hours.  It can also be used as a flashing emergency light.  Comes with 5 cellphone charger adapters.

The sun recharges a built-in 700mAh/3.6v NI-MH battery.

$37.50 ea. @ 21st-century-goods.com