Iria

"Today we are looking at a portable solar battery charger system that has tips to fit most all popular phones, game systems and other portable devices. The Devotec Solar Charger also works with the iPhone and iPod.

When I plug the Devotec Solar Charger into my iPhone the iPhone beeps and recognizes the charger just as it does the stock dock or charge cable. You can make and receive calls while the phone is connected to the Devotec Solar Charger. Perhaps the best news for users looking for a device like the Devotec Solar Charger is that it is cheap and ships worldwide. The device sells for £19.99 or about $40 in the US. Devotec will ship the charger anywhere in the world for a bit under $6."
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Source: I4U