I keep seeing reference to solid state battery cell in the R&D reports coming out of Electrovaya.  Here is one from the FYQ1 Report.

"The Company doubled its R&D expenditures in Q1 FY2021 when compared to Q1 FY2020. The Company added more staff with the focus on areas of cell chemistry, solid state cells, system design, electronic firmware and software"

I wonder just how close they are to announcing a Solid State Cell??