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VW’s solid-state battery passes its first endurance test.

The months-long test included over 1,000 charging cycles, with the batteries retaining 95 percent of their energy capacity, according to QuantumScape, a San Jose-based startup backed by Volkswagen and Bill Gates. That’s better than the industry standard of completing 700 charging cycles while retaining 80 percent capacity. Most EVs use “wet” lithium-ion batteries containing liquid electrolytes to move energy around. Solid-state batteries, which have been slow to come to market, promise faster charging speeds, more capacity, and longer range vehicles.