Tesla Inc. is reportedly strengthening its relationships with South Korean suppliers of key battery materials, including cathodes, anodes, and copper foil. This move is part of the electric vehicle maker's broader strategy to increase its in-house battery production, reduce reliance on external cell manufacturers, and gain tighter control over its supply chain. By securing a more direct and stable supply of high-quality materials from established Korean firms, Tesla aims to enhance the efficiency and cost-effectiveness of its battery manufacturing processes. This initiative is crucial as the company continues to scale its vehicle production globally and expand its energy storage business. The development underscores the increasing importance of vertical integration in the competitive EV market.