This Comfy Shoe Doubles As A Footstep-Powered Wi-Fi Hotspot
New, flexible power harvesting technology has finally made it practical to harness the energy from your movements—enough to even charge your phone.
Each time you take a step, you waste around 20 watts of power—around 20 times more than it takes to run a typical smartphone. But even though researchers have been chasing the idea of an energy-harvesting shoe since the early 20th century, long before any addiction to mobile gadgets, it's only now that it's actually feasible to turn footsteps into a power source.