Paulcifer,  I was under the impression that Toyota's solid state battery they have been working on for many years does not measure up to the needed standards for use in vehicles.  That is why there is so much speculation that Toyota will use the Electrovaya battery cell.  The big problem is in the past Toyota has refused to use a battery they did not own.  Electrovaya is just as tenacious a negotator as Toyota so do not expect anything soon on that front.  JMHO....