Apple Inc., which has been working secretly on a car, is pushing its team to begin production of an electric vehicle as early as 2020, people with knowledge of the matter said. The timeframe — automakers typically spend five to seven years developing a car — underscores the project’s aggressive goals and could set the stage for a battle for customers with Tesla Motors Inc. and General Motors Co., both of which are targeting a 2017 release of an electric vehicle that can go more than 200 miles on a single charge and cost less than $40,000. “That’s the inflection point — the proving ground — that brings on the electric age,” Steve LeVine, author of “The Powerhouse,” a book about the automotive battery industry, said on Bloomberg TV Thursday. “Now you have Apple coming in and this is critical mass. Was GM really going to be […]