We are thinking about buying a Model X, and I am wondering since the Gigafactory is moving full speed ahead, how long it will be before Tesla incorporates the new Reference 2170 size lithium-ion cells with the higher energy density into the Model X and S? The Model S and X currently have the Reference 18650-size lithium-ion cells. From what I understand the new 2170 cells have up to 30% more energy density and use far less cobalt. This makes them easier to make and less expensive. My best guess is that one of two things will happen if and when Tesla switches batteries: Either they will keep the 75D and 100D designation, and put in fewer batteries, which does not seem likely or smart. The other option would be that they would offer a 100D and 130D, both of course with 30% greater range for the same price as the current models. I know Tesla plans to shut down the Freemont factory for ten days or so in June, so I wonder if at that point they will switch over, or maybe I am being too optimistic? Any thoughts on what the timeframe would be for this?