A fast-charging system that promises to fully charge an electric car in 15-20 minutes will be demonstrated for the first time at an electric vehicle show next week.  The Electric Vehicle Symposium will see eight major car manufacturers (Audi, BMW, Chrysler, Daimler, Ford, GM, Porsche and VW) throw their weight behind a standardised DC-fast charging system. It will, according to a Volkswagen Group press release, “accelerate more affordable deployment of electrified vehicles and charging infrastructure.”