Following the recent resumption of 4680 cell production for Model Y vehicles, Tesla has confirmed achieving a key manufacturing milestone: full dry-electrode processing for both anode and cathode components. VP Bonne Eggleston highlighted the breakthrough on X, enhancing supply chain resilience amid trade tensions, as noted in the Q4 and FY 2025 update.
In a follow-up to its Q4 2025 shareholder letter announcing 4680 packs for select Model Ys, Tesla detailed progress on the dry-electrode process originally introduced at Battery Day. This method eliminates solvents used in wet processes, promising lower costs, higher energy density, smaller factory footprints, and easier scaling.
Bonne Eggleston, Tesla's VP of 4680 batteries, posted on X: "both electrodes use our dry process." This resolves prior limitations where Tesla relied on conventional methods for parts of electrode production, despite earlier 4680 output.
The advancement bolsters U.S.-based manufacturing at facilities like Gigafactory Texas, reducing dependence on foreign suppliers amid tariffs and trade barriers. It aligns with Tesla's strategic pivot toward high-volume Model 3 and Model Y production, as Model S and X face potential phase-out, enabling more flexible domestic supply for core vehicles.