PRINCETON, NJ—The best U.S. cities for new electric vehicle factories are Charleston, SC; Chattanooga, TN; and Minden, NV, according to a recent study conducted by the Boyd Co.

MOUNT PLEASANT, WI—Foxconn Technology Group plans to produce batteries at its factories here and in Lordstown, OH.

Battery manufacturers tend to be conservative in their efforts to maximize production processes and still maintain sustainable assembly costs.

DETROIT—General Motors announced Tuesday its plans to invest $7 billion in Michigan to increase the production of electric vehicles and battery manufacturing. It's the single biggest investment in the company's history.