Samsung SDI announced on Friday that its U.S. branch secured a massive new contract to supply batteries. While the company kept the specific partner’s name a secret, industry experts strongly believe the deal involves Tesla’s energy storage business.
The South Korean battery maker kept the details of the agreement strictly confidential. In a regulatory filing, the company said it would not reveal the contract amount, the specific buyer, or the length of the deal for business reasons. In fact, Samsung SDI does not plan to share any more information about this partnership until January 2030.
This news follows a hint the company dropped in late 2025. Back in November, Samsung SDI admitted it was in talks to supply batteries to Tesla. That admission came after the Korea Exchange asked the company to explain rumors about a deal worth 3 trillion won, or roughly $2.08 billion. While the company didn’t confirm the exact dollar amount today, the new filing suggests those talks turned into a final agreement.
The demand for these types of energy storage systems, or ESS, is exploding right now. Much of this growth comes from the artificial intelligence boom. AI data centers require a staggering amount of electricity to run, and they need giant batteries to manage that power and keep the grid stable. Samsung SDI has spent years proving its technology is safe and cost-effective, which helps it win these high-stakes contracts against global competitors.
By landing this deal, Samsung SDI strengthens its footprint in the United States. Even though the company is staying quiet for now, the connection to Tesla marks a major win for its energy storage division. As more companies build out AI infrastructure, battery makers like Samsung SDI expect to see even more of these multi-billion dollar deals in the coming years.
