Researchers working on promising idea to solve a lingering smartwatch issue

Researchers are exploring how we could one day use our bodies to power full-fat smartwatches like the Apple Watch or Samsung’s Galaxy Watch.

The lab work to make it a reality is taking place at the Chinese University of Hong Kong, where it has a devised a generator that can be built into a smartwatch to harvest energy as your body moves.
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https://www.wareable.com/smartwatches/self-charging-smartwatch-generator-8167