This compact device from Better Energy Systems opens up like a fan and lets you take advantage of the free sunlight beating down from above, storing it inside its internal battery. Then you can begin using the Solio's stored power as a recharger for your iPod, MP3 player, cellphone, portable games machine, digital camera or other handheld device.
If your device's battery dies when you're out in the wilds, on the beach, or in the mountains, the Solio would be extremely useful to have around I'm sure, and the price is good I think.
From one of their FAQ pages...
Creating your Solio used energy. Help make this back—and more—by charging from the sun as much as possible. Become a producer of clean energy.
Solio is intended to achieve a net energy benefit over its lifetime. To reach this goal, energies needed for raw materials and production have been minimized.