 The Volt 's battery cells are produced by LG Chem in South Korea and then shipped to the US , where the battery packs are assembled at a purpose @-@ built facility in Brownstown Charter Township , Michigan owned and operated by General Motors . Compact Power , the North American subsidiary of LG Chem , is building a battery plant in Holland , Michigan to manufacture the advanced battery cells for the Volt and other carmakers , with capacity to produce enough cells for 50 @,@ 000 to 200 @,@ 000 battery packs per year . The US $ 303 million Holland plant was funded by 50 % U.S. Department of Energy matching stimulus funds and is planned to open by mid @-@ 2012 . 
