gravity
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This $5 Lamp Is Powered By Gravity (And Just Destroyed Its Funding Target On Indiegogo)
John Koetsier | VentureBeat | December 26, 2012
A lamp for $5 that does not require any electrical power source? It may sound like an impossible dream, but two designers in London have built functioning prototypes of GravityLight, a cheap way for people in developing countries t0 light homes, recharge batteries, or power a radio. Read More »
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