Attach it to a window and it charges and stores the power. You can then take it off the window, put it in your pocket and you have power for a device for a few hours. Slick little device. (Not available in the US yet)
http://grist.org/list/just-stick-this-portable-outlet-to-your-window-to-start-using-solar-power/?utm_campaign=socialflow&utm_source=facebook&utm_medium=update
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