https://www.youtube.com/watch?v=sTIH6ncIXYc&t=32m20s https://www.youtube.com/watch?v=sTIH6ncIXYc&t=32m20s (or 30m0s for the whole story) According to Elon Musk

https://www.youtube.com/watch?v=sTIH6ncIXYc&t=32m20s https://www.youtube.com/watch?v=sTIH6ncIXYc&t=32m20s (or 30m0s for the whole story) According to Elon Musk currently lithium ion battery production steps are scattered all over the world and this creates enormous overheads and transportation costs. His plan is to consolidate everything to one place and get raw materials from the mines and produce batteries on site at his gigafactory.