Will sweat replace batteries?

"If you were out for a run, you would be able to power a mobile device."

Sweat-fueled batteries?

Sweat could fuel the future of wearable devices, said Timothy Revell at New Scientist​. Re­search­ers have figured out how to power a simple radio for up to two days with a skin patch that harvests energy from human sweat. The flexible patch, which is less than an inch across, "contains enzymes that replace the precious metals normally used in batteries" and feed off the lactic acid found in sweat.

(Image credit: University of California San Diego)

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