Warranties, certification and health testing
What manufacturers guarantee and how independent tests measure it.
You'll learn
- Explain warranties, certification and health testing at engineering level
- Read the numbers that define the behaviour
- Apply the idea to a real pack
Overview
Most EV batteries carry an eight-year warranty with a capacity floor. Knowing how that floor is measured matters when you make a claim.
In depth
Reading the small print
Warranties specify a capacity threshold, a mileage cap, and a measurement procedure — usually a controlled full charge and discharge performed by the dealer. Dashboard range estimates are never the contractual measure.
| Typical term | Value |
|---|---|
| Duration | 8 years |
| Mileage cap | 160,000 km / 100,000 miles |
| Capacity floor | 70% of original usable |
| Remedy | Repair, module replacement or pack replacement |
Key takeaways
Remember this
- Warranty capacity floors are usually 70% at eight years.
- Measurement follows a defined procedure, not the range display.
- A health certificate supports resale value.
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