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 E-Mail IMAGE: A prototype backpack harvests energy from walking to power small electronics, and it makes loads feel lighter. view more  Credit: Adapted from 2021, DOI: 10.1021/acsnano.0c07498 Hikers, soldiers and school children all know the burden of a heavy backpack. But now, researchers have developed a prototype that not only makes loads feel about 20% lighter, but also harvests energy from human movements to power small electronics. The new backpack, reported in ACS Nano, could be especially useful for athletes, explorers and disaster rescuers who work in remote areas without electricity, the researchers say. Backpacks are widely used in everyday life for the hands-free carrying of loads. Over time, however, walking or running with a heavy sack can cause back and neck pain. Also, backpackers in wilderness areas (or even those in cities who don t have ready access to a charger) might wish for a bag that could harvest the mechanical energy of walking to power p

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