Donut Lab says it has developed what it describes as a solid-state battery that is ready for use in production vehicles, and ...

Donut Lab brings an all-solid-state pack to the Verge TS Pro electric motorcycle, charging in about 5 minutes, so you get ...

But what does that mean? The simple answer is how heavy something is for its size. If something seems very heavy for its size (like a heavy metal object), we say it is more dense. If something seems ...