According to this article, Gigafactory 3 has 7,000 batteries ready to go.
https://cleantechnica.com/2019/11/0...-3-production-will-use-lg-chem-cells-in-2020/
https://cleantechnica.com/2019/11/0...-3-production-will-use-lg-chem-cells-in-2020/