see more

A charging device sits attached to Tesla Model S P90D automobile inside the Tesla Motors Inc. showroom at a dealership, on Oxford Street in London, U.K., on Wednesday, Dec. 16, 2015. After losing $1.88 billion since 2007, Tesla is piling on the personnel as it offers more models, builds the worlds biggest battery factory and expands globally, including stores opening in Mexico City and Edinburgh. Photographer: Chris Ratcliffe/Bloomberg via Getty Images

A charging device sits attached to Tesla Model S P90D automobile inside the Tesla Motors Inc. showroom at a dealership, on Oxford Street in London, U.K., on Wednesday, Dec. 16, 2015. After losing $1.88 billion since 2007, Tesla is piling on the personnel as it offers more models, builds the worlds biggest battery factory and expands globally, including stores opening in Mexico City and Edinburgh. Photographer: Chris Ratcliffe/Bloomberg via Getty Images