A small Finnish startup says it has done what the world’s biggest automakers are still struggling to do: put a solid-state battery into a production vehicle, starting with a motorcycle that can charge nearly 200 miles of range in as little as 10 minutes (or less, with a high-speed charger).

“For the last 15 years, the entire battery industry in automotive has been talking about solid-state batteries—that they’re the future,” says Marko Lehtimäki, CEO of Donut Lab, the startup that makes the new battery. “But up until today, despite all the talk, there’s never been a single production vehicle that uses solid-state........

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