Full Breakdown
Tesla's 4680 Battery Supply Chain Faces Major Setback
12/29/2025, 8:02:49 PM
Supply Contract Reduction Signals Trouble for Tesla
South Korean battery material supplier L&F Co. has announced a drastic reduction in its supply agreement with Tesla, slashing the contract's value from approximately $2.9 billion to just $7,386. This significant cut, reported on December 29, 2025, indicates a severe decline in demand for Tesla's in-house 4680 battery cells, primarily used in the Cybertruck. Initially signed in February 2023, the contract was intended to supply high-nickel cathode materials from January 2024 through December 2025. However, L&F cited a "change in supply quantity" as the reason for the reduction, without providing further details.
Background on the 4680 Battery Program
Elon Musk unveiled the 4680 battery cell during Tesla's Battery Day in 2020, promoting it as a key innovation that would enable the production of a $25,000 electric vehicle. The 4680 cells were expected to reduce costs and improve performance by eliminating the use of expensive materials like cobalt. Despite these ambitions, the production of 4680 cells has faced challenges, particularly with the dry electrode manufacturing process, which has hindered scaling efforts.
Demand Issues for the Cybertruck
The Cybertruck, the only vehicle currently utilizing the 4680 cells, has struggled to gain traction in the market. Reports indicate that Tesla's production capacity at Giga Texas is around 250,000 units per year, yet the current sales run rate is only 20,000 to 25,000 units annually. In response to poor demand, Tesla has implemented various incentives, including discounted financing and the discontinuation of the cheapest Cybertruck variant. Analysts suggest that if Tesla is not producing Cybertrucks, the need for 4680 cells diminishes, leading to L&F's drastic contract reduction.
Broader Industry Context
The reduction in L&F's contract is reflective of broader challenges facing the electric vehicle (EV) industry. Analysts have noted a slowdown in EV demand growth, compounded by the recent removal of U.S. federal subsidies under the Inflation Reduction Act. Other South Korean battery manufacturers, such as LG Energy Solution and SK On, have also faced significant setbacks, including contract cancellations and joint venture dissolutions with major automakers like Ford.
Official Statements & Responses
L&F emphasized that the contract revision was driven by changing market conditions rather than product quality issues, stating, "There have been no changes to shipments or customer supply of the company’s flagship high-nickel product." Meanwhile, Tesla has not publicly commented on the contract reduction or its implications for the 4680 battery program.
Criticism & Opposition
Critics argue that the failure to ramp up 4680 production undermines Tesla's long-term strategy and raises questions about the viability of its ambitious plans for affordable electric vehicles. The Cybertruck's disappointing sales performance has led to skepticism regarding Tesla's ability to innovate and adapt in a rapidly evolving market.
Conflicting Reports & Gaps
While L&F's announcement indicates a near-total cancellation of the contract, some sources suggest that the reduction may not be entirely due to Tesla's production issues but also reflects broader economic pressures affecting the EV market. The exact reasons behind the drastic cut remain unclear, as neither Tesla nor L&F has provided detailed explanations.
What's Next for Tesla?
Looking ahead, Tesla plans to integrate 4680 cells into its upcoming Cybercab model, expected to launch in early 2026. However, the success of this initiative remains uncertain, particularly given the ongoing challenges in scaling production and meeting market demand.
