Tuesday 15 September 2026
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EV batteries retain about 90% capacity after 150,000 km, study finds

Real-world data on used electric vehicles suggests durability fears may be overstated

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By LineZotpaper
Published
Read Time1 min
Most used electric vehicles retain about 90 percent of their original usable battery capacity after 150,000 kilometers, according to a new study — a finding that challenges one of the key concerns holding drivers back from switching from petrol cars.

Battery durability has remained one of the main worries for drivers considering an electric vehicle, even as global EV sales have surged on the back of rising fuel prices. The new study offers reassurance: most used EVs keep roughly 90 percent of their usable capacity after 150,000 km of driving.

That figure sits comfortably above the typical warranty threshold. EV battery warranties usually cover eight years or 100,000 miles (160,000 km), with manufacturers required to provide a replacement battery if capacity falls below 70 percent. The study suggests most vehicles stay well clear of that trigger point over the warranty period, easing concerns about costly out-of-warranty replacements.

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Analysis

Why This Matters

  • Battery degradation is consistently cited as a top barrier for drivers weighing a switch from petrol; this study provides evidence that real-world durability is stronger than feared.
  • The gap between typical real-world retention (~90% at 150,000 km) and the 70% warranty threshold suggests many batteries could outlast the vehicles they power.
  • Stronger battery longevity could support used EV values and accelerate the broader transition away from combustion engines.

Background

EV sales have grown rapidly worldwide as fuel prices have risen, but concerns about range and battery replacement costs have remained persistent hurdles to adoption. Industry warranties have largely standardized around eight years or 100,000 miles, with a 70 percent capacity floor triggering a manufacturer-paid replacement. This study adds one of the clearer real-world data points on how batteries actually age under normal driving conditions.

Key Perspectives

Drivers: The main interest is avoiding expensive battery replacements; the data suggests most vehicles will not approach the 70% threshold during typical ownership. Car manufacturers: Their warranty terms already anticipate significant degradation, and the study's findings suggest those terms may be conservative relative to real-world performance. Caveats to note: The study reflects average performance; battery life varies with usage patterns such as rapid charging frequency, extreme climates, and how deeply batteries are discharged.

What to Watch

  • Whether warranty terms are revised as more long-term durability data accumulates.
  • How battery health data influences used EV pricing over the coming years.
  • Longer-term degradation patterns as more vehicles push well past 160,000 km.

Sources

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Articles published under the Zotpaper byline are synthesized from multiple source publications by our AI editor and reviewed by our editorial process. Each story combines reporting from credible outlets to give readers a balanced, comprehensive view.

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