According to Mary Barra during the recent quarterly earnings call there won't be an issue with battery production.The first Ultium batter plant will open mid-year in Lordstown, Ohio followed by the Spring Hill Tennessee plant in 2023 and the Lansing Michigan plant in 2024.

On top of that there will be a 4th plant announced in the next 6 months.

Plenty of Batteries
GM will not run short of batteries, Barra says. The first Ultium Cells joint venture plant with LG Energy Solution to make battery cells will open mid-year in Lordstown, Ohio, followed by plant No. 2 in Spring Hill, Tennessee, in 2023, then plant No.3 in Lansing, Michigan, in 2024 and the location of plant No.4 will be announced in the next six months.