The main rule: years, kilometres and a health threshold
Most manufacturers warrant the battery for about 8 years or 160,000 km (whichever comes first). Important: the warranty usually does not promise that the battery stays like new, but that it stays above a certain health threshold — often around 70% SOH. The exact years, kilometres and threshold differ per brand and model year: always check the warranty booklet of your car.
What that means in practice If the battery drops below the threshold within the term, the manufacturer must repair or replace it (often with modules, not necessarily a whole new battery). Is the battery at, say, 78%? Annoying for the range — but within the warranty conditions, so no claim.
Why measuring just before the warranty ends is so smart
- If the battery is close to the threshold, you want to know that while the warranty is still running — not three months after
- A measurement records the condition in black and white; that is your evidence in a warranty discussion
- Even if everything is healthy, the certificate is valuable: it raises the trade-in or sale value
Our tip Plan a measurement around the 7th year (or well before the kilometre limit). It takes a few minutes, and you know exactly where you stand before the safety net disappears.
When buying a used car
- Check how much remaining warranty is left on the battery (warranty almost always follows the car, not the owner — but verify this per brand)
- Have a measurement done: then you know whether the battery sits comfortably above the threshold or dangerously close to it
- A car just above the warranty threshold is not necessarily a bad buy — but it is a solid price argument
The pitfalls
Where it often goes wrong
- Warranty is about capacity, not range — fewer kilometres due to cold or driving style is not a warranty case
- Conditions — some brands require maintenance or software updates; do not skip those
- Damage and misuse are excluded
- "According to the seller it is still well above the threshold" — without a measurement that is an opinion. The threshold is exactly where you want an independent number
Want to know where your battery stands relative to the threshold?
One measurement, a few minutes — with a certificate you can use for warranty, sale or trade-in.
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