This is the best summary I could come up with:

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 liter, which is about 100 times greater than TDK’s current battery in mass production.

The breakthrough is the latest step forward for a technology industry experts think can revolutionize energy storage, but which faces significant obstacles on the path to mass production, particularly at larger battery sizes.

Kevin Shang, senior research analyst at Wood Mackenzie, a data and analytics firm, said that “unfavorable mechanical properties,” as well as the difficulty and cost of mass production, are challenges for moving the application of solid-state oxide-based batteries into smartphones.

Japanese companies are in the vanguard of a push to commercialize the technology: Toyota is aiming for as early as 2027, Nissan the year after and Honda by the end of the decade.

Zeng’s CATL originated as a spin-off from Amperex Technology, or ATL, which is a subsidiary of TDK and is the world’s leading producer of lithium-ion batteries.

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