A groundbreaking study has evaluated the durability of 500,000 electric vehicle (EV) batteries from leading car manufacturers, including Tesla, Ford, and BMW, over a five-year period. The research aimed to identify which battery chemistries and packs demonstrated superior aging characteristics under real-world conditions.
The investigation was conducted by Aviloo, a company specializing in EV battery diagnostics. It leveraged comprehensive data from battery management systems (BMS) across a wide spectrum of EV models, analyzing performance degradation, capacity loss, and the effects of varying usage patterns.
Key findings revealed that battery longevity varies significantly not only by manufacturer but also by cell chemistry and thermal management strategies. Some brands showed more consistent capacity retention, while others experienced faster reduction in usable charge over time. Factors such as climate, charging habits, and driving styles also influenced battery aging, underscoring the complexity of EV battery performance in daily use.
The study provided insights relevant to consumers considering long-term ownership, as well as manufacturers aiming to optimize battery design for durability. It also highlighted the importance of diagnostic tools for assessing battery health to inform maintenance and resale value.
While the report did not single out a definitive “best” battery, it emphasized that advances in lithium-ion technologies and cooling systems have significantly improved battery life compared to earlier generations. The data suggest that buyers should consider not only the initial range but also the projected degradation rates when evaluating EV options.