Charging batteries--a walk in the park.(NEWS/NOUVELLES)

Canadian Chemical News, April, 2008

[ILLUSTRATION OMITTED]

Simon Fraser University (SFU) researchers have developed a new wearable technology that generates electricity from the natural motion of walking. It promises to revolutionize the way we charge portable battery-powered devices.

The biomechanical energy harvester, featured in a recent issue of the journal Science, resembles a lightweight orthopedic knee brace. The device harvests energy from the end of a walker's step, when the muscles are working to slow the movement of the leg, in much the same way that hybrid-electric cars recycle power from braking.

Wearing a device on each leg, an individual can generate up to five watts of electricity with little additional physical effort. Walking more quickly generates as much as...

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