“Japan’s TDK is claiming a breakthrough in materials used in its small solid-state batteries, with the Apple supplier predicting significant performance increases for devices from wireless headphones to smartwatches.

The new material provides an energy density — the amount that can be squeezed into a given space — of 1,000 watt-hours per litre, which is about 100 times greater than TDK’s current battery in mass production.”

From Financial Times.