For years, one of the biggest worries around electric cars has been simple: “Will the battery still be any good after a few years?”
EV Batteries Are Holding Over 90% Capacity After Six Years
A major new analysis of 24,000 EV battery health certificates across 11 European countries shows that electric car batteries are proving far more durable than expected.
- Battery degradation is slow and predictable, averaging around 1% loss every 16,000 miles, after a small early drop.
- Batteries retain around 93% of their original capacity after 43,500 miles.

Why This Matters for UK Drivers
These real‑world results should come as a major confidence boost for drivers considering an EV – especially through salary sacrifice, where most cars are brand-new and under full warranty.
The findings show that used EVs are holding their value better as battery health is remaining healthier for longer, and this is continuing to improve year-on-year as technology advances. However, newer EV models with improved cooling systems and battery design are performing 2-3% better than older ones.
For businesses and employees using salary sacrifice schemes, this is especially reassuring – it means the EV you drive today will still retain strong battery performance well into the future.
Transparency Around Battery Health Is Improving
More than 30,000 battery health certificates have already been issued for used EVs, signalling a major shift toward greater transparency in the second‑hand market. This move is set to accelerate as upcoming Euro 7 regulations introduce standardised battery health displays directly on vehicle dashboards. EVs are also expected to feature a digital battery passport in the near future, giving drivers clear insight into each vehicle’s battery history and certified capacity.

What This Means for Anyone Considering an Electric Car Through Salary Sacrifice
At EZOO, we often hear concerns about how long EV batteries really last – but the reality is far more reassuring. EV batteries are designed to perform extremely well, with degradation happening slowly, predictably, and far less than most people expect. Newer models are even more resilient thanks to ongoing advances in battery technology. For employees, that means dependable long‑term performance. For employers, it means a confident, lower‑risk transition to electric fleets.
If battery life has been your last big doubt about going electric, the evidence now speaks for itself. EV batteries are proving to be one of the most reliable parts of the car – not the weakest link.And with salary sacrifice making brand‑new electric cars up to 60% cheaper, there’s never been a better time to switch.
Related read: EV Myths VS. Facts