Sounds like there was more than the "converter upgrade" bottleneck, and that there is a current oversupply issue which has caused Li chemicals to fall from the January 2018 highs.
Week 44 Wrap: Relatively boring week ahead of US election; HotCopper's most watched; Oz inflation at 3.5%
MKT The ASX can overlook its Telecomm small-caps. Here’s one diversified brand with an international footprint