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Natural drive


The wooden bowl on the kitchen table, the cheese roll in the fridge. Apart from a few exceptions, these days pretty much everything is battery-operated.

And there aren’t always enough sockets to go around. For some time researchers have been working on how to use our bodies as biological batteries.

The latest development? A stretchable polyimine module that can be worn on the finger or arm like a piece of jewelry.

With the help of thermo-electric generators and liquid metal wires, electricity is harvested through body heat. The device generates 1 volt for every cm² of skin, enough to power watches and fitness trackers.

The voltage can be boosted by combining more units; the material is highly resilient and recyclable.


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