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Researchers have demonstrated a flat, "stretchy" battery that can be pulled to three times its size without a loss in performance.
While flexible and stretchable electronics have been on the rise, powering them with equally stretchy energy sources has been problematic.
The new idea in Nature Communications uses small "islands" of energy-storing materials dotted on a stretchy polymer.
The study also suggests the batteries can be recharged wirelessly.
Stretchy Battery Development [bbc.co.uk]
I want to know if it gives longer usage.