Electric vehicle batteries are proving far more durable than both drivers and industry skeptics have long feared. A new study, highlighted in recent reporting from Ars Technica and echoed across outlets including MSN and al.com, finds that most used EVs retain about 90 percent of their original usable battery capacity after 150,000 kilometers (roughly 93,000 miles). The finding challenges the pervasive anxiety that EV batteries will degrade quickly and require expensive replacements, a concern that has historically deterred many car buyers from making the switch.

A lingering fear among drivers

Despite a global surge in EV sales driven by rising fuel prices and climate concerns, battery durability remains one of the key psychological barriers to adoption. Drivers often worry that an electric car's most expensive component will wear out long before the rest of the vehicle. This fear is not entirely baseless: EV battery warranties typically cover eight years or 100,000 miles (160,000 km), and manufacturers are required under those warranties to provide a replacement if capacity falls below 70 percent. The implicit suggestion is that significant degradation is expected within a decade.

But the new data paints a far rosier picture. The study, reported by Ars Technica, indicates that the vast majority of used EVs on the market are retaining far more capacity than the warranty threshold. At 150,000 km, the average remaining capacity is around 90 percent — meaning a typical EV would still have nearly full range after years of driving. Only after significantly higher mileage does capacity begin to dip toward 70 percent in a meaningful way.

“EV batteries last longer than drivers feared,” the study's central conclusion reads — a message that seems designed to counter the doomsaying that has followed electric vehicles since their modern resurgence.

Why the study matters

The implications are significant for the second-hand EV market, which has lagged behind new EV sales partly because buyers are unsure about the health of used batteries. If batteries are proven to hold a 90 percent charge after 150,000 km, a five-year-old EV with typical annual mileage would still offer close to its original range. That makes used EVs a far more attractive proposition and helps strengthen the overall business case for electrification.

The study also undercuts the narratives promoted by some EV skeptics, who have pointed to battery degradation as a fatal flaw of the technology. MSN's headline was blunt: “Modern EV batteries last way, way longer than those 'EV skeptics' want you to think.” Indeed, real-world data from fleet operators and early Tesla models already suggested that modern lithium-ion batteries degrade slowly, but this study provides systematic evidence across a range of models.

Beyond degradation: making batteries even better

While the study focused on how today's batteries age in practice, other research is exploring how tomorrow's batteries can be made even more resilient. Digital Trends reported on a fascinating discovery from Cambridge experts: simply applying pressure to a battery can extend its life in an “utterly simple fix.” The Cambridge team found that mechanical compression during charging and discharging can suppress the formation of lithium dendrites—tiny, needle-like structures that can cause short circuits and accelerate degradation. This could lead to design changes in battery packs and contribute to even longer lifespans in future EVs.

The two stories, taken together, offer a comprehensive picture: current EV batteries are already exceeding expectations, and new innovations could push durability even further.

So when should you replace an EV battery?

For owners, the practical question is: when will a battery really need replacing? The al.com report frames the issue clearly. Under warranty, replacement is guaranteed if capacity falls to 70 percent. But studies like this one suggest that most drivers will never hit that threshold during typical ownership. Based on the 90 percent retention at 150,000 km, a battery would likely need to travel well over 300,000 km (about 186,000 miles) before approaching 70 percent. That's far beyond what most drivers put on a car before moving to a new one.

The caveat is that battery health depends on habits. Frequent rapid charging, extreme temperatures, and regularly draining to near-zero can accelerate degradation. But for typical drivers who charge at home overnight and use fast chargers mostly on road trips, the battery is likely to outlast the rest of the car.

A shift in perspective

This new data represents a turning point in how we talk about EV batteries. For years, the narrative was dominated by fear and skepticism. Now, evidence is mounting that EVs may actually be less expensive to own in the long run than petrol cars, thanks to lower running costs and fewer mechanical components—and now, a battery that lasts longer than originally promised.

As the automotive industry transitions to electric, this reassurance is vital. It signals to consumers that an EV is not a disposable product with a ticking clock under the floor, but a durable vehicle that can serve thousands of miles with minimal range loss. The study also adds pressure on automakers to back their batteries with longer warranties, since the underlying technology is clearly capable of lasting beyond the current eight-year standard.

For policymakers, it supports the push for accelerated electrification. If batteries last longer, the environmental lifecycle of an EV improves substantially, because the most resource-intensive component does not need to be replaced multiple times. In short, the fear of battery failure is receding—and the evidence only grows stronger.