Tesla's New Battery Technology Doubles Energy Storage Capacity
Tesla has unveiled next-generation battery technology that doubles energy density while reducing costs 30%. The breakthrough could accelerate both electric vehicle adoption and grid-scale energy storage deployment.
By Sarah Mitchell - Chief Political Correspondent
Last Updated: December 16, 2025
Tesla battery breakthrough
Technical Breakthrough
Tesla's new 4680 cell uses a dry electrode process and silicon anode that doubles energy density. A vehicle battery pack that once weighed 1,000 pounds can now store the same energy at 500 pounds.
EV Impact
Doubled density means 600+ mile range becomes practical, or significantly smaller and lighter battery packs. The cost reduction makes EVs price-competitive with economy cars.
Grid Storage
Grid-scale storage projects become more economical, enabling higher renewable energy penetration. Tesla's Megapack product will use the new technology starting in 2026.