Tiny 'supercapacitors' could make batteries live longer
 

Scientists in Canada and France have created a micro-supercapacitor with the same energy density of a modern lithium-ion battery that could potentially last forever. Supercapacitors have long been eyed by scientists and industry leaders like Elon M...

http://www.engadget.com/2015/10/01/m...citor-battery/