"Researchers from Lawrence C. Rome of University of Pennsylvania reported the development a new backpack that turns energy into electricity. This means scientists, hikers, explorers, and soldiers can produce electricity. The researchers used a backpack fastened to the carrying frame by springs. The up-and-down motion caused by walking powers a small generator, producing electricity that can be used directly or stored in a capacitor or battery. The electricity-generating frame weighs about 10 pounds, Rome said in a telephone interview. He's working to lighten it, so it will weigh only a couple of pounds more than a standard backpack."Amusing, I wonder whether this will motivate people to do more jumping jacks. ;-) Anyways, on a more serious note, cool idea for those of us who are into the outdoors kind of stuff.