GoKawiilAviloo study: EV batteries retain ~90% capacity after 150,000km
A study by Austrian battery-analysis firm Aviloo, based on over 500,000 tests across 20 popular EV models including Tesla's Model Y and Volkswagen's ID.4, found median battery health ranging from 87 to 94 percent after 150,000 kilometers of use. The research found degradation levels between 91-97 percent at 50,000km and 88-95 percent at 100,000km, though rates varied widely depending on climate, battery size and driving habits.