Smart tattoos are one of the hottest things around. Tech researchers believe they will be a great way to monitor both vital signs and not-so-vital signs. One of the stumbling blocks is getting power to them. Joseph Wang, a researcher from University of California San Diego, has come up with a way to generate power for these devices without using any external equipment. The secret to his success is harnessing the electrons from lactate acid secreted in a persons sweat.

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Tags: Tech, Technology, Tattoos, Wearable Computers, Computers, High Tech