Some folks take a power walk just for the purpose of getting into shape. But if some researchers at Simon Fraser University in Canada have their way, soon the notion of taking a power walk will take on a whole new meaning. This, according to the ScienceNOW Daily News, which reports that these Canadien scientists have engineered a device called a “Biomechanical Energy Harvester” that converts the momentum of bending knees into electric energy. By simply putting on a brace that captures the energy from normal walking, this device can produce some 5 watts of power in little time – enough to run ten cell phones! With prototypes now being refined, it might not be long before consumers will get, literally, a real charge out of simply taking a walk.