well i am kinda curious how expensive and how hard it is to make things like that .. unfortunatly i went the cash way out and bought a flashlight from sharper image
http://www.sharperimage.com/us/en/catalog/productview.jhtml?pid=57680500&pcatid=1&catid=103
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Hummer Shake Flashlight
$29.95
Hummers® always have the right of way -- and Hummer Shake Flashlights are always ready! All the rugged Hummer® flashlight ever needs is a quick 30-second shaking to generate power for up to five full minutes of bright illumination. Inspired and licensed by GM's intrepid Hummer, this shockproof, rubber-guarded, waterproof and floatable flashlight is ideal for outdoor use and perfect for every vehicle or home emergency kit.
Its LED bulb never needs replacing and there are no batteries to worry about -- ever! Faraday's Law of Induction explains how the relative motion of the built-in magnet sliding between metal coils charges the light's capacitor. For prolonged use, just shake for an additional 10 seconds every three minutes. Rugged translucent plastic housing measures 8" long. Weighs 8 oz. Select translucent case of yellow or red. 90-day warranty.
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not like im trying to advertise for them or such just though it was a nice LED flashlight that seemed to be somethign like your tryin to do and well they work well also
Nasher