Donut Lab says its new solid-state battery is as cheap as current lithium-ion batteries, but it can charge faster, last longer, and won’t start fires. 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).