TDK Corporation(OTC:TTDKY), a major supplier of batteries toApple Inc.(NASDAQ:AAPL) andTesla Inc.(NASDAQ:TSLA), has announced a significant breakthrough in solid-state battery technology.

What Happened: TDK, a leading supplier of smartphone batteries, has made a major breakthrough in the materials used in its small solid-state batteries. The company predicts a substantial increase in the performance of devices ranging from wireless headphones to smartwatches, the Financial Times reported on Monday.

"We believe that our newly developed material for solid-state batteries can make a significant contribution to the energy transformation of society. We will...