Image via Earthtechling When we see personal chargers, they’re almost always based on absorbing energy from the sun . Once in a great while, we also hear of new personal wind-powered chargers . But we almost never hear about water-powered personal chargers. This concept device, called the Vena Microhydro System by designer Danial Hull, bridges a gap in options for the outd… Read the full story on TreeHugger
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River-Powered Personal Charger Expands Energy Options for the Outdoorsy
