Battery-free lamp for developing nations is powered by gravity
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In areas with poor access to electricity, many people rely on dangerous kerosene lamps once night falls. The Nokero solar-powered light is one solution that is aiming to deal with the problem, and now deciwatt.org's GravityLight joins it in providing cheap, safe and environmentally-friendly light for developing nations. While solar panels can be expensive and rely on sunlight and batteries to work, the GravityLight requires neither. The device is connected to a bag that can be filled with sand – or other weight – and is able to convert the energy when the weight is lifted. For example, raising the…
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