The energy we use to move about is rather inefficiently applied. Researchers at Simon Fraser University in British Columbia have come up with a way to harvest this lost energy and store it in rechargeable batteries.

“People are an excellent source of portable power–an average-sized person stores as much energy in fat as a 1,000 kg battery,” Donelan said. “People recharge their ‘body batteries’ with food and, lucky for us, there is about as much useful energy in a 35-gram granola bar as in a 3.5 kg lithium-ion battery.”

from news.com

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