American inventor John Goodenough first started working on battery technology more than 40 years ago. Goodenough actually co-invented lithium-ion batteries in 1980. This eventually led to a revolution in the electronics industry because those devices were smaller and provided more electricity than other fuel cells. Sony Corporation was the first business to commercially develop the lithium-ion technology. In 1991, Sony launched worldwide sales of lithium-ion batteries. They enabled the company to start producing small video cameras and other devices that soon became very popular. The same technology is still used today to power most personal devices. Now, John Goodenough is 94-years-old. He continues working as an engineering professor at the University of Texas in Austin. Goodenough recently announced what he believes is another major development in battery technology. He and his engineering team have produced the first-ever solid-state battery cells. He hopes this latest invention will shake up the electronics world.