Estream is the world's smallest hydro power plant
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Moving water becomes stored energy as the devices turbine turns, even during a weak current or when dragged behind a kayak or canoe. The battery takes about 4.5 hours to fully charge, then it is fully portable and able to fully fuel three smartphones, GoPros, or even tablet PCs. Its modular design also allows it to transform into an underwater lantern. Related: Riversimple launches a 250 mpg hydrogen-powered car The rechargeable nature of the Estream depends on the consistent presence of...