http://www.cbc.ca/news/world/tesla-delivers-first-china-cars US lithium-ion factory location to be decided
Musk said Tesla still is deciding where in the United States to build what it says could be the biggest factory to produce lithium-ion batteries.
The company is looking at four states — Arizona, New Mexico, Nevada and Texas — and is likely to break ground in more than one before making a final decision, Musk said. He said the company wants to make sure construction stays on schedule and keeps up with demand from Tesla's California auto assembly line.
"We are going to proceed with at least two locations in parallel, just in case one of them encounters some issues after breaking ground," Musk said. He said Panasonic was likely to be Tesla's partner in battery production.
https://www.cbc.ca/news/world/tesla-delivers-first-china-cars-plans-national-expansion-1.2617500