“…The PowerWalk features a gearbox that mechanically converts the knee’s rotation speed into a higher speed that is more efficient for the onboard power generator to then convert to electrical power. The result is 10 to 12 watts of electricity, which is itself then converted to charge Li-ion or NiMH batteries…”
Good to have if you’re in the mountain’s somewhere.
I wonder what the trade off is between carrying extra power and the extra work generating it.
It actually sounds useful, but it must have a setting where the generator is off. You would not want to be in the situation where you have to run for your life and be restrained by your Powerwalk (man down, phone fully charged!).
a really cool futuristic gadget, better than generating electricity while walking: