A massive new EV study just dispelled the biggest myth about electric car batteries

• A new report is the largest-ever analysis of EV battery condition in the UK
• Results suggest that older vehicles retained a median 85% battery capacity
• Even very high-mileage vehicles rarely trouble their manufacturer warranty

The latest results from Generational’s 2025 Battery Performance Index reveal that EV batteries are more robust and reliable than predicted, with most packs likely to exceed the lifespan of the vehicle itself.

Generational, which is a UK-based innovator in electric vehicle battery condition diagnostics, claims the report is the largest analysis of EV battery condition undertaken in the UK, with more than 8,000 passenger cars and light commercial vehicles analyzed in the study.

The results show that the average battery State of Health (SoH) across all of those used vehicles involved stands at a robust 95.15% of capacity compared to new.