Ann: Rincon 2,000tpa Li2CO3 Operations Update, page-11

Feb

Battery quality99.76% lithium carbonate product successfully produced in single-run

during current commissioning and production test-works phase

Jan

Battery quality99.76% lithium carbonate product successfully produced during

current commissioning and production test-works

This is significant imo.
My take on that is that the 1 ton they produced last month was not in a single run but involved a stop start process while testing each part of process, while this month's producton (whatever that amount is) has tested the whole process end to end without any interruptions & has resulted in more 99.76% Li.
Sound to me like everything is working ok.