General Motors will announce plans to build more battery factories in the United States this week.

The car manufacturer has already committed to building two battery factories with joint venture partner LG Energy Solution in Lordstown, Ohio, and Spring Hill, Tennessee. GM is investing $2.3 billion to construct each of these facilities.

While speaking with The Associated Press at the IndyCar race over the weekend in Detroit, GM president Mark Reuss confirmed that more battery factories are in the works, without revealing where they will be located.

“In the next week we’ll announce some more, and it will be here in the U.S.,” Reuss said.

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GM spokesman Jim Cain confirmed to The Detroit News that the automaker will build more factories to boost its battery capacity as sales of EVs increase. The Lordstown factory will employ 1,100 workers when it opens next year while the Spring Hill facility will employ 1,300 and open in 2023. The other battery factories can be expected to be similar in size. These two plants will initially supply cells to five GM factories that will build EVs.

These factories are located in Michigan, Tennessee, Ontario, and Mexico and The Detroit News suggests that the new battery factories could be located near some of these sites.

Like so many other automakers this year, General Motors recently announced that it will stop selling ICE vehicles by 2035 and aims to be carbon natural by 2040. The company will offer 30 EVs globally by the middle of the decade and by the end of 2025, 40 per cent of the brand’s vehicles in the U.S. will be electric.