Knee brace can generate power for small gadgets
The brace was developed by the University of Michigan and “works much like regenerative braking charges a battery in some small hybrid vehicles.” Tests were performed on six men walking 2.2 miles per hour on a treadmill while wearing the 3.5-pound brace.
The weight of the device did affect the wearer somewhat but the actual generation of energy did not. So assuming the brace can be slimmed down a bit, we might have a winner on our hands here, folks.
Knee brace generates electricity from walking [PhysOrg.com]