The standard EV battery warranty
Across the manufacturer brand pages we've researched on this site, 8 years or 100,000 miles is by far the most common EV battery warranty length, typically guaranteeing the battery retains at least 70% of its original capacity throughout that period. This figure was confirmed directly on the official UK sites of Mercedes-Benz, Audi, Volkswagen, BMW, MINI, Volvo, Skoda, SEAT, Vauxhall, Peugeot, Citroën, Fiat, Renault, and Nissan, among others.
Plug-in hybrid (PHEV) batteries are often covered for less than full EVs. Several brands apply a shorter term specifically to PHEV batteries: Mercedes-Benz and BMW/MINI cover PHEV batteries for 6 years/60,000-62,000 miles, while the Volkswagen Group (Audi, VW, Skoda, SEAT) covers PHEV batteries for 5 years/100,000 miles — and in the VW Group's case, that PHEV battery cover applies only to the first owner and doesn't transfer if the car is sold, unlike the rest of the warranty.
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A few manufacturers stand out from the 8-year norm:
- Porsche uses a two-stage capacity guarantee rather than a flat 70% threshold: at least 80% of original capacity for the first 3 years/38,000 miles, then at least 70% for the remainder of the 8-year/100,000-mile term.
- Toyota covers hybrid batteries as part of its standard warranty up to 10 years/100,000 miles, and owners can extend hybrid battery cover specifically up to 15 years from first registration via a stand-alone Hybrid Health Check.
- Suzuki has announced a 10-year EV battery warranty for its upcoming e Vitara — two years longer than the roughly 8-year industry standard, though this applies to that specific model rather than Suzuki's range generally.
- Renault uses different minimum capacity thresholds depending on powertrain type: 63% for Hybrid Electric Vehicles and 77% for Plug-in Hybrid Electric Vehicles, both within an 8-year/100,000-mile term.
WORTH KNOWING
"8 years or 100,000 miles" is a strong pattern across UK manufacturers, but it's not universal, and the capacity guarantee threshold varies too. Always check your specific manufacturer's terms directly rather than assuming every EV warranty works identically.
What "70% capacity" actually means
Most EV battery warranties don't promise the battery will never degrade — gradual capacity loss through normal use and charging is treated as expected, not a defect. What's guaranteed is that if a manufacturing or material defect causes the battery to drop below the stated threshold (commonly 70%) within the warranty period, the manufacturer will repair or replace it. Degradation caused by factors outside the manufacturer's control — like not charging or storing the battery as recommended — is typically excluded.
Frequently asked questions
How long is a typical EV battery warranty in the UK?
8 years or 100,000 miles is the most common figure across the manufacturers we've researched, though it varies by brand.
Do plug-in hybrids get the same battery warranty as full electric cars?
Not always — several manufacturers (Mercedes-Benz, BMW, MINI, and the Volkswagen Group brands) cover PHEV batteries for a shorter period than full EV batteries.
What does the battery capacity guarantee actually cover?
It guarantees the battery won't drop below a stated percentage of its original capacity (commonly 70%) due to a manufacturing defect — not general wear from normal use and charging.
Which manufacturer offers the longest EV battery warranty?
Based on our research, Suzuki has announced a 10-year battery warranty for its upcoming e Vitara, and Toyota allows hybrid battery cover to extend to 15 years through its Hybrid Health Check scheme — both longer than the roughly 8-year standard seen elsewhere.