2021 and beyond, page-106

"The initial 20,000 litres of Kachi brines are beingprogressively processed through Lilac's pilot plant in California. The results continue to confirm the successful scale-up of processing from lab scale to pilot plant scale. Only a minor scale-up is required to achieve targeted commercial scale."

In time to company will reveal more imho.

Actually the production time is hours rather than days but if you want to be conservative then use days but this is way better than the current means of lithium extraction which is measured in years.