Tiny energy-harvesting MilliMobile robot has no need for batteries
The four-wheeled prototype device measures just 10 mm (0.4 in) per side, and tips the scales at about 1 gram (0.04 oz)
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The four-wheeled prototype device measures just 10 mm (0.4 in) per side, and tips the scales at about 1 gram (0.04 oz)