Making Electricity as you Backpack
According to Wired, researchers have come up with a backpack that makes electricity as you backpack. It makes about 7 watts, enough for MP3 players, cell phones, PDAs. From the article:
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.
It currently weighs about 10 pounds, but they are working to get it down to just a couple. Every ounce counts when you’re backpacking!