The joint venture between General Motors and Samsung SDI for a brand-new battery factory in Indiana is dead. Samsung SDI bought GM’s 49.99% stake in SynergyCells, making it the sole owner and operator of the upcoming facility. General Motors and Samsung SDI have ended their joint venture to build batteries in a new factory that’s being constructed in Indiana. Now, though, Samsung SDI said it will start assembling batteries for energy storage systems (ESS) to respond to the rapidly growing stationary energy storage market in the United States. “While reflecting recent market changes, this acquisition decision is to continue the strategic partnership with GM,” said a Samsung SDI official.