Tesla’s newest battery technology centers on the 4680 cell format—a larger cylindrical cell that’s 46mm in diameter and 80mm tall. Introduced at Battery Day 2020, these cells deliver 5x more energy, 6x more power, and 16% greater range compared to previous 2170 cells. Tesla pairs these with a structural battery pack design where cells become load-bearing components, eliminating 370 parts and reducing vehicle weight by 10%.

What Makes Tesla’s 4680 Battery Cell Different?

The 4680 cell uses a tabless design that dramatically reduces the electrical path length. This innovation cuts internal resistance, improving thermal management and enabling faster charging. Tesla’s dry electrode coating process—acquired through Maxwell Technologies—eliminates solvent-based manufacturing, reducing production costs by 50% per kWh while increasing energy density by 5x.

How Does the Structural Battery Pack Work?

Tesla’s structural pack integrates cells directly into the vehicle chassis using polyurethane foam encapsulation. The cells themselves bear mechanical loads, replacing traditional battery module housings. This architecture reduces mass by 10% and increases torsional rigidity by 14%, improving both efficiency and handling dynamics.

What Are the Performance Benefits?

Production 4680 cells in the Model Y deliver approximately 244 Wh/kg energy density at the cell level. Tesla projects 54% cost reduction per kWh at full production scale, enabling more affordable EVs. The Cybertruck utilizes 1,366 4680 cells arranged in structural packs, providing over 120 kWh capacity with improved crash safety.