Stretchable lithium-ion battery!

Maybe my dreams of a real, walking and talking Gumby and Pokey can finally be realized! Northwestern University's Yonggang Huang and the University of Illinois' John Rogers demonstrate in the picture above how their battery continues to power the red LED even when they stretch it to 300% its original size! As soon as they let go, it immediately pops back into the beginning size and shape. According to the scientists, the battery will work for 8 or 9 hours before needing to be recharged--which can actually be done wirelessly. This means it can likely be used inside the human body to power heart or other devices. Or live-action Gumby dolls. Whichever application makes more sense to you.



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