*SPOILER ALERT* Do not watch this if you want to be surprised at Tesla Battery Investor Day. This video is my entire theory of how Tesla tested Maxwell's tech in 2017/18, bought the company in 2019, and has been scaling in house battery cell production with the DBE technology, ever since. Tesla's biggest constraint on growth is they don't have enough batteries. On Battery Investor Day they will announce they are bringing cell production in house and will bring a new battery cell to market to solve this problem IMO. It's going to be epic :) Plz comment your theories below. Remember this is all a guess!! I have no idea what Tesla will actually announce.