“Will my EV battery die in five years?” It’s a question that lingers among buyers—and yet the truth is far less dramatic. In 2025, most EV owners still enjoy over 90% of their original battery capacity after years of use. Here’s what British drivers need to know about battery degradation, warranties, and how to keep your car performing long-term.
What Causes EV Battery Degradation?
Lithium-ion batteries lose capacity over time due to chemical wear—especially from:
- Repeated fast charging cycles
- Extreme temperatures (hot or cold)
- Charging to 100% or discharging below 10%
But modern battery management systems reduce wear and protect the cells. Most drivers see only around 2–3% capacity loss per year.
Real-World Data: How Much Battery Loss To Expect
Studies from UK and European EV fleets (Tesla Model 3, Hyundai IONIQ 5, Kia EV6) show:
- After 24 months and ≥10,000 miles: ~5% loss
- After 5 years (~60,000 miles): most retain 85–90% capacity
Battery Warranties: What UK Manufacturers Cover
Most UK EVs come with at least:
- 8-year / 100,000-mile battery warranty
- Minimum 70–75% capacity guarantee
Tips to Maximise Your EV Battery Life
- Avoid frequent fast charging—limit DC sessions to occasional use
- Charge between 20–80% when practical
- Use pre-conditioning features in cold weather
- Park in shade where possible during hot days
TIP: Use the ONEEV app to track charging logs—and monitor usage over time to understand your battery habits.
Warranties vs Real Use: What UK Drivers Report
Hundreds of real-world drivers in UK forums report battery loss lower than manufacturer promises—most experiencing better retention than the 70% worst-case scenario.
Insurers now increasingly use charging logs and battery diagnostics—especially helpful for resale or warranty claims.
The Final Word
EV battery life is not a ticking time bomb. With sensible use, modern EV batteries remain effective for 8 years or more. Manufacturers back that confidence, and with tools like ONEEV, you stay in full visibility of your battery health.
