Solar powered chargers are the latest fashion. We've seen jackets, backpacks and other devices that promise you to charge your gadgets. The Prometeo just seems more useful. It was designed for Samsung's Young Design contest and is a bit large to wear around your neck, yet it's still possible to do so.
It charges up on solar energy. Once it's charged, wearers can simply plug in a couple of USB devices and transfer the accumulated energy to them. There is also an integrated power meter to let you know just how full the device actually is. It might be useful to have a back up AC charging port, but that would just defeat the purpose of the device, which is to furnish the user with green energy.