The team of three scientists showed that a prototype of the battery was able to power a temperature sensor and send data to a smartphone through Bluetooth.
Each battery was made by printing ink containing silver flakes onto a stretchable, sweat absorbent fabric, and measures 2cm by 2cm, about the size of a small postage stamp but thicker. When sweat comes into contact with the battery, the chloride ions and acidity of sweat cause the silver flakes to clump together.
The NTU battery could be more durable than those using existing technology. It can be used when the wearer is exercising and can withstand repeated exposure to sweat.
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