Tesla has developed new nickel-based battery cells that can be charged to 90% for everyday driving without affecting long-term durability, narrowing the gap with lithium iron phosphate (LFP) batteries, its chief engineer Lars Moravy said.
Tesla currently recommends owners limit daily charging of nickel-based packs to 80% to extend lifespan, reserving 100% charging for long trips. The new cells will give future Tesla drivers in the United States, where nearly all vehicles sold use nickel batteries, an additional 10% range in daily use, Moravy said.
Nickel cells provide higher energy density but degrade more quickly when left at full charge, leading Tesla to advise against prolonged use at either extreme. By contrast, LFP batteries, widely used in China, can be charged to 100% daily with little degradation. Tesla even encourages owners of LFP-equipped cars to charge fully at least once a week to help calibrate battery management systems.
Tesla has stopped offering LFP-powered vehicles in the U.S. due to sourcing and tariff constraints. With most U.S. models relying on nickel-based packs, the ability to safely charge to 90% will be a meaningful improvement for American customers, Moravy said.