EV battery longevity exceeds previous expert projections

New research suggests that electric vehicle (EV) batteries may be more durable than previously estimated. A study by the SLAC-Stanford Battery Center indicates that real-world driving conditions—including frequent acceleration, braking, and short charging stops—may extend battery life by up to 38 percent compared to standard laboratory tests that rely on constant discharge rates.

Complementing these findings, the Aviloo Certified EV Battery Report, based on over 500,000 tests conducted between 2022 and 2026, shows that batteries generally age slower than consumers fear. After 150,000 kilometers, the median State of Health (SoH) for tested models ranged between 87 and 94 percent, well above the typical manufacturer guarantee of 70 percent capacity.

Performance varies significantly by model and battery size. The Mercedes-Benz EQA showed the highest median SoH at 94 percent, followed by the Hyundai Ioniq 5 and BMW i4. Conversely, models with smaller batteries, such as the Nissan Leaf ZE1 and Renault Zoe, showed higher degradation, likely due to the need for more frequent charging cycles to cover the same distances.