The Window Solar Charger can be used to power your smartphone through sunlight from the window. The charger is a rechargeable lithium battery that holds 1400mAh of electric charge.
Because it can stick to any window, it can be used at home, in the car, or at the office. The energy is completely green, as it is all collected through solar panels on the window-facing side of the device.
USB and Mini-USB ports provided: