battery warranty

Quick answer: Modern EV batteries degrade slowly — about 2.3% of capacity per year on average according to Geotab’s 2026 analysis of 22,700 EVs, projecting roughly 82% of original capacity after eight years. Most packs last 12–20 years in normal use, and federal rules require an 8-year/100,000-mile battery warranty. Sudden total failure is rare; gradual…