"a UK-based firm that evaluates EV battery health, collected data from over 8,000 EVs tested in 2025. Most of the cars the company tested had healthy batteries with close to their original capacity. "Battery degradation is not the systemic risk it was once assumed to be. Real-world data shows that most EV batteries comfortably exceed warranty thresholds, even at higher ages and mileages," the company said in its report, adding that in "most cases, the battery is likely to exceed the lifespan of the vehicle.""
"The average score was surprisingly high: 95.15%. The study included over 8,000 electric vehicles from 36 brands, ranging from ones less than a year old to 12 years old and with up to 160,000 miles on the clock. The overall data set skewed toward younger EVs that were five years old or less, which helps explain the high average. Still, if you look at a breakdown of vehicle health by age, it's clear that even older EVs are holding up fairly well."
"We've all seen the horror stories of EV batteries that go bad, saddling the owner with a repair bill well north of $10,000. While it's certainly wise to be cautious when buying a used EVespecially if a deal sounds too good to be truea new study found that used EV battery packs are healthier on the whole than you might think."
Generational, a UK-based firm that evaluates EV battery health, collected data from over 8,000 EVs tested in 2025. The average battery health score across the dataset was 95.15%. The dataset covered 36 brands, ages under one year up to 12 years, and up to 160,000 miles, and skewed toward vehicles five years old or younger. Battery capacity declines with age, but many older EVs still commonly exceed typical warranty floors. High mileage alone does not reliably indicate a bad battery. A health test can reveal actual degradation and help confirm battery condition before purchase.
Read at insideevs.com
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