Here is my speculation on what tesla will release next in terms of Model S. We all know the Model X is coming out July/August time frame with higher capacity battery. Most here agree the Model X will come in 2 forms: 1) 85KWh version 2) ???KWh version. I think it will be 105KWh. This relates to the Model S because most likely it will share the same battery form factor. This will also likely be the case with the Model 3 to keep battery production smooth, compatible, and easy. It also makes replacement and servicing easy. That being said here is why: The Model S 70D have 240 miles of EPA range. The Model S 85D have 270 miles of EPA range. Going from 70KWh to 85KWh we see a 30 miles range increase. Or 15KWh yield 30 additional miles at the higher KWh number. Hence if we are going to see a 300 miles Model S, we will need another 30 miles. Given the non-linear trend, I say we are looking at either a 105KWh battery if we have higher energy dense Li-ion cells or 110KWh with the current cells tech. The current 85KWh battery currently occupies most of the current battery space. I would think the increase will come in higher energy dense cells. Factoring everything in, I would say with confident, the new Model S will be a 105D with new battery cells technology. Now when this will be available is to be seen. I think because of the upcoming release of the Model X, I don't expect the 105D Model S to be coming out anytime soon. The gigafactory is not up and running yet. So my prediction: Model S 105D with 295 or 300 EPA miles with newer cells technology added when the gigafactory starts churring out cells probably later in the year ~Fall/Winter 2015 timeframe. The Model X will also be in 2 form, the 85D and 105D version and will be using up ALL the new cells if there will be a new cell batteries. What do you guys think?