A Swedish analysis of nearly 10,000 electric vehicle (EV) battery health tests has found that several EV models retain the vast majority of their original battery capacity even after years of use. The findings highlight continued improvements in battery longevity as EV adoption accelerates worldwide Recently, Austrian researchers developed a battery management system that detects hidden cell damage and aging, improving EV battery safety, performance, lifespan, and predictive maintenance. Korean manufacturers dominated the rankings, with the Kia e-Niro equipped with a 64 kWh battery claiming the top spot. The mechanically related Hyundai Kona Electric, also fitted with a 64 kWh battery, ranked second with 97.18%, while the Kia EV6 with a 77.4 kWh battery placed third at 95.95%. Cells shape longevity The study highlighted that battery chemistry and cell supplier can significantly influence long-term battery health, even within the same vehicle model.