writes "We've heard about Tesla building this new gigafactory to produce battery packs for its electric cars. Heck, the company's current bottleneck is its ability to get battery packs for its electric cars. In fact, last year Tesla used a bit more than one-third of the auto industry's electric-car batteries, and that was with only selling 22,477 cars last year. Tesla is expanding its model lineup as quickly as possible with the introduction of the Model X crossover next year and a compact sports sedan in 2017. With the rapid expansion of its vehicle line, Tesla is going to need a crazy amount of battery packs, and quickly. Thus, the Silicon Valley upstart is building the gigafactory to engineer and produce battery packs in march larger quantities. If Tesla can remove the battery production bottle neck it's currently facing, the only question left will be market acceptance of a mainstream electric car."