The Mophie is indeed interesting, and it inspired me to look around a bit. I ran across yet another Goal Zero gadget - the Torch 250 - http://www.rei.com/product/880088/goal-zero-torch-250-flashlight

It charges from an integral solar panel, a usb port, or a hand crank (perfect for masochists) and has slightly more capacity than the Mophie Power Station...
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Geezer in Chief