A Swedish study analyzing nearly 10,000 EV battery health tests has revealed that the Kia e-Niro holds onto the most capacity after 62,000 miles, outperforming Tesla and other automakers.
The study, conducted by online car marketplace Carla, used AVILOO's diagnostic tool to measure true battery state of health in EVs sold in Sweden between 2022 and 2026.
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Hyundai Motor Group Dominates Top Three
The Kia e-Niro retained 97.25 percent of its original capacity after 62,000 miles.
It shares its 64 kWh battery with the Hyundai Kona, which came in second at 97.18 percent.
The Kia EV6 with a 77.4 kWh pack secured third place with 95.95 percent battery health.
All three top performers belong to the Hyundai Motor Group.
The strongest European EV was the Volvo XC40 Recharge with a CATL-sourced 69 kWh battery, retaining 94.70 percent.
The Polestar 2 with a 78 kWh CATL pack followed at 94.35 percent.
The BMW i3 and the LG Chem version of the Polestar 2 recorded 93.77 percent and 93.53 percent, respectively.
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Tesla's Best Performer: Model 3 with LFP Battery
Tesla's highest-ranked model was the Model 3 equipped with a 60.5 kWh LFP battery from CATL, retaining 93.34 percent of its capacity.
This edged out the Model 3 with an LG Chem NMC battery at 91.5 percent.
Other notable performers include the Audi e-tron 50 and 55 at 93.02 and 92.93 percent, the Skoda Enyaq iV at 92.88 percent, the Tesla Model S at 92.80 percent, the VW ID.
4 at 92.77 percent, and the Tesla Model X at 92.52 percent.
The study's broader takeaway is that modern EV batteries are highly durable.
Every vehicle in the ranking retained more than 90 percent of its capacity after 62,000 miles, which most owners reach after three to four years of driving.
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The battery pack is now likely to outlast the car itself.
