Embedded with a waterproof 2.7-watt solar panel, this medium size solar backpack is ideal for hiking, biking and other outdoor activities - or simply for keeping your games and phones charged while you're out and about. The backpack is trendy yet still comfortable because of the extra cushioning on the back and wide shoulder straps.

* 1 hour in the sun = 1 hour cell talk time

* After a half day in the sun, it is able to charge a battery inside the backpack full

* It takes up to 2 hours to use the built-in battery in the backpack to fully charge a cell phone or an iPod nano.

Specifications:

* Solar Panel: Crystalline Signel panel, 2.7 Watts

* Panel dimension: 6.7*4.3 inches (17*11cm)

* Peak voltage/current: 6V 450mAh

* Battery capacity: 2200mAh rechargeable Li-ion

* Max output voltage/current (max): 5.5V 650mAh

* Direct charge and indirect charge through the solar panel are both available

* Size: 18.5*12.6*8.3 inches (47*32*21 cm)

* Material: 600D polyester

Accessories:

* 1 Rechargeable Li-ion Battery, capacity = 2200mAh

* 1 piece of connecting wire, 3 feet long

* 7 mobile charging tips that accomodate most cell phones in the market, such as Blackberry, iPhone, Motorola, Samsung, Sony Ericsson, Nokia

Includes a donation of up to $85.05 to the school or non-profit of your choice.