We hit .27 in March 2018. The 10-Q from June 2018 has the share count at 162M at the time.
So, doing simple math, that would be a $44M M/C or a share price of ~.19 in today's ratio. (~230M)
We are much further along than we were back then on some fronts (battery), and really not bad in so far as revenue etc. (our revenues for the 6 months ending June 2018 was only $138,085).
So, like I said, it is tough to gauge with a company that isn't profitable, but we should really be at many times the current share price - IMHO - right now.
Plus if some more deals, and/or advancements on the battery front, that ".19" high should be blown away, even with the increased shares outstanding.