They are buying the same batteries currently, but are scheduled to announce an important battery breakthrough sometime this month at "Battery Day". According t

They are buying the same batteries currently, but are scheduled to announce an important battery breakthrough sometime this month at "Battery Day". According to leaks, this is known as project roadrunner inside Tesla. They have some unique new patents on battery tech like this one: https://patents.google.com/patent/WO2020082019A1/ https://patents.google.com/patent/WO2020082019A1/ A single crystal cathode significantly reduces stress as it has fewer seams. This video provides a great explanation if you're interested in the technical details: https://www.youtube.com/watch?time_continue=11&v=dpe-ajzucTE https://www.youtube.com/watch?time_continue=11&v=dpe-ajzucTE