Mercedes EQA tops largest-ever EV battery health study — SkimNews
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- AVILOO's AVILOO Certified EV Battery Report — built from 500,000-plus physical battery tests across 20 popular EVs — ranks the Mercedes EQA first with 94% median state of health at 150,000 km, followed by the Hyundai IONIQ 5 at 93.8% and the BMW i4 at 93.6%.
- Hyundai IONIQ 5 actually leads at lower mileage, holding 97.1% SoH at 50,000 km before the German pair catches it later in the curve.
- Small-pack models — the Nissan Leaf (86.7%), MINI Cooper SE (87.1%), and Renault Zoe (87.3%) — finished last, with the MINI Cooper SE the sharpest faller in the study, dropping 7 points of SoH between 50,000 and 150,000 km.
- Tesla Model Y landed at 90.3% SoH at 150,000 km and the Model 3 at 88.9%, the second-worst result for any car with a battery its size, undercutting the reputation the company has leaned on.
- Individual variation within a single model can run as high as 13.5 percentage points of SoH, meaning a "good" and "bad" IONIQ 5 on the same lot are "genuinely different products" that no window sticker or dashboard reading reliably distinguishes.
- Mercedes-Benz, Volvo, and Porsche Holding have named AVILOO their preferred independent battery-testing provider for European dealerships; AVILOO's FLASH Test is a three-minute OBD-port diagnostic backed by TÜV and CARA certifications.
- AVILOO launched a Battery Warranty across 12 European countries this summer, paying £2,700 in the UK or €3,000 elsewhere if a pack drops below its individual SoH floor within a year.
Why it matters: Used-EV buyers face a 13.5-point SoH spread between identical-model examples — a gap the median rankings completely hide — so independent pre-purchase testing, not the dashboard reading, is what determines real-world range. Even the worst-performing model in the study still holds 86.7% of its capacity at 93,000 miles, which undercuts the narrative that EV batteries are a used-car risk.
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