The PowerWatch allows the wearer to keep their watch on them at all time, because the power source is their body temperature

What if you could wear a watch that recharges itself as you wear it? Enter the PowerWatch— a watch that is powered by harnessing the heat of the wearer's body.

Developed by technology company Matrix Industries, the watch runs on the company's thermoelectric generator technology. In order for it to work, a temperature difference is required, such as a warm, human body and the cold metal watch. The PowerWatch has heatsinks in the design to maintain the necessary temperature difference so that the wearer does not have to regulate it. When it is not being worn, it goes into low power mode in order to maintain the correct time until it is worn again.

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