Lucas123 writes "The University of Michigan's Center for Objective Microelectronics and Biomimetic Advanced Technology (COM-BAT) is working on building a robot bat that would perform long-range reconnaissance for the U.S. Army, but U.Mich is currently struggling with miniaturizing components in order to make the bat small enough to be stealthy. 'The focus is to shrink down many electronics that while currently available would only be good if the US Army wanted, say, a 12-foot spy-bat.' Some components need to be 1,000 times smaller than they currently are. The Army's $10 million grant proposal calls for the bat to be six inches in length, weigh four ounces and use just one watt of power. The bat is supposed to be powered by a lithium-ion battery, charged by solar and wind energy, as well as simple vibrations."
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