One of the nuances that gets lost when talking about battery costs is the difference between cell-level (individual 18650 / 2170 li-ion cells) costs and pack-level (the assembled collection of thousands of those cells) costs.
Both costs are expressed as $/kilowatt-hour but comparing them is comparing apples to apple pie.
Samsung, LG and Panasonic specialize in producing individual cells and don't do a lot of EV pack-level assembly. I think LG does pack assembly for the Chevy Bolt, but that car isn't produced in very large quantities and has a stated cell cost of $145/kwh.
There are hints that Tesla can producing entire packs at a comparable cost/kwh, if not less.
Both costs are expressed as $/kilowatt-hour but comparing them is comparing apples to apple pie.
Samsung, LG and Panasonic specialize in producing individual cells and don't do a lot of EV pack-level assembly. I think LG does pack assembly for the Chevy Bolt, but that car isn't produced in very large quantities and has a stated cell cost of $145/kwh.
There are hints that Tesla can producing entire packs at a comparable cost/kwh, if not less.