New Twist on Power Walking
An anonymous reader writes "Carrying a newly designed backpack loaded with between 44 and 84 pounds of gear, users generate enough electricity to simultaneously power an MP3 player, a PDA, night vision goggles, a handheld GPS, a CMOS image decoder, a GSM terminal in talk mode, and Bluetooth."
Here's a picture http://www.heise.de/bilder/63699/0/1 . The aparatus just takes a small part of the weight. However, you have to put something in your backpack, whatever it is, to generate power.