For Tesla Motors, Success Is All About the Batteries

Musk says battery cell capacity will need to double worldwide for Tesla to produce a mass-market electric car.

http://www.technologyreview.com/view/521201/for-tesla-motors-success-is-all-about-the-batteries/?utm_campaign=newsletters&utm_source=newsletter-weekly-energy&utm_medium=email&utm_content=20131111