From the transcript of Tesla's quarterly (Q1 2018) conference call with investors, May 2, 2018: Rod Lache - Deutsche Bank Securities, Inc. ...your comments in your letter on the advances in batteries were interesting. Could you give us some insight into how we can translate that into cost per kilowatt hour? Or some metric in terms of the gains that you're making? Deepak Ahuja - Tesla, Inc. Every data point, Rod, that we look at internally suggests that we are best-in-class, but we don't prefer to... Elon Reeve Musk - Tesla, Inc. We're best, which is not a class. Deepak Ahuja - Tesla, Inc. Yes. We're the best. Sorry. Elon Reeve Musk - Tesla, Inc. The best-in-class of one. Jeffrey B. Straubel - Tesla, Inc. I think directionally, Rod, it's helpful to understand the different commodities and the trends that we're pursuing in the batteries. Being on a path to reduce cobalt usage, for instance, has been something we've been working on for literally several years now, and this has been extremely helpful in the overall cost per kilowatt hour, especially with recent commodity price movements. So, we can't really be quantitative, but that directionally is a pretty good trend. Elon Reeve Musk - Tesla, Inc. Yeah, we think we can get the cobalt to almost nothing. (Source: Seeking Alpha) https://seekingalpha.com/article/4169027-tesla-tsla-q1-2018-results-earnings-call-transcript?part=single * * * * * The InsideEVs New site now has an article on that: "Tesla Panasonic Quietly Outmaneuver All Lithium Battery Manufacturers" Unfortunately the article isn't set up to allow comments. So I've created this discussion thread for the subject.