VW's solid-state 'forever' EV battery

The current industry standard for electric vehicle batteries targets a 20% capacity loss over 700 charging cycles, which means an EV that rolls off the lot with a 250-mile range could end its life with a range of 50 fewer miles per charge by the time the odometer clicks to around 150,000 miles. (For some vehicles like the Tesla Model S, the pricier 100-kilowatt-hour batteries degrade faster than 8...