In the first quarter of 2015, South African-US entreprenuer Elon Musk saw there were not enough batteries to meet expected electric vehicle (EV) demand, so decided to invest in a battery "giga-factory" in the US.

Working with Panasonic, his EV company Tesla built a plant in Nevada whose capacity was the equivalent of the world’s entire output, at that time, under one roof.

“It’s a 35-gigawatthour (GWh) plant, which is enough to make 500,000 pure EVs,” said Simon Moores, managing director of London-based Benchmark Minerals Intelligence.