Energy Harvesting Combat Boot with GPS

Unlimited by the lifetime of a battery, this combat boot uses footsteps to power a GPS transmitter providing geographical coordinates over a cellular network. Optimally positioned lungs in the sole of the boot drive miniature turbines connected to generators, providing usable electric power on the order of 10s of mW when walking. The boot can help locate friendly forces in critical combat situations, aid in locating the missing, and prevent misidentification of individuals in unfamiliar areas — all powered by walking.
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