The BYD EV battery warranty
BYD battery cover is typically around 8 years / 125,000 miles on the traction battery to 70% capacity, with shorter separate cover on the drive unit and the rest of the car. The warranty usually transfers with the car, so what matters on a used one is how much is left and whether the battery is still comfortably above the capacity threshold. Read more in our guide to how EV battery warranties work.
How BYD EV batteries age
BYD builds its own LFP “Blade” batteries, and LFP chemistry is one of the most durable in the market: it tolerates being charged to 100% every day and holds capacity well over a lot of cycles. The catch on a used BYD is not the cells but the newness of the brand in the UK, long-term high-mileage and resale data is still thin and the dealer and parts network is young, so full warranty paperwork and service history matter more than usual.
Whatever the make's reputation, individual cars vary with charging habits, climate and mileage, which is why we always frame battery health as an estimate for the specific vehicle. Our guide to what's normal for EV battery degradation covers the general picture.
BYD model guides
BYD Atto 3
Compact SUV · 2022-present (UK 2023) · Around 260 miles
Battery health & rangeBYD Seal
Saloon · 2023-present (UK 2024) · Around 323-354 miles depending on version
Battery health & rangeBYD Dolphin
Supermini / small hatchback · 2023-present (UK) · Around 211-265 miles depending on battery
Battery health & rangeDon't see the model you're looking at? Any EV's battery health can be checked by registration.
What the Used EV Check shows for a BYD
Enter the registration and the Used EV Check returns, for that specific car: its expected real-world range now versus when new, an estimated degradation figure, a battery-health grade where a manufacturer test record exists, and the battery warranty remaining in miles and months, plus the full MOT and mileage history.
Range and battery-health figures are estimates modelled from real-world data and are shown for the specific vehicle in the Used EV Check. Range data is powered by ClearWatt. A battery-health grade is shown where a manufacturer test record exists, it is a comparative grade, not a measured state-of-health percentage.
Check a used BYD EV before you buy
Enter a registration to see the car's estimated battery health, real-world range now vs when new and remaining battery warranty, an instant report.