This $5 billion battery factory is intended to enable production of half a million EV cars per year by 2020. It's more amazing to me to think of the scale requ

This $5 billion battery factory is intended to enable production of half a million EV cars per year by 2020. It's more amazing to me to think of the scale required in the mid 2020's when EV cars could be 10's of millions per year.