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Backpack Straps Generate Power

Apparently intended for soldiers carrying 100 pound packs, these backpack straps generate power from the weight of the bag and your walking.

"Instead of cutting into your shoulders, these nylon-like straps convert that mechanical strain into electrical energy, and researchers have figured out that if you carry a 100-pound pack and walk at 2-3 mph you can generate 45.6 mW of power. That's enough to the power an iPod, or maybe a head-mounted flashlight. But a 100-pound pack? They're saying that's a typical weight for soldiers to carry. That'll make you think twice about signing up to go to Iraq."

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