His company, Tremont Electric???s first patented offering is a hand-held device they call the ???nPower PEG.???The unit, costing roughly $150, stores kinetic energy created simply by walking, jogging, or biking and can then deliver enough juice to recharge a device such as a mobile phone or MP3 player???theoretically forever.nPower was first conceptualized when Aaron was hiking the Appalachian Tra