Battery
BYD Atto 3 Blade Battery
The BYD Atto 3 battery is BYD's Blade Battery, an LFP (lithium iron phosphate) pack of 49.92 kWh or 60.48 kWh in the classic car and 60.48 kWh or 74.88 kWh in the 2026 Atto 3 Evo. The chemistry tolerates regular charging to 100%, which changes how the car should be charged.
Last reviewed: September 2026
What the Blade Battery is
The Blade Battery is a pack built from long, flat LFP cells placed directly into the pack, a layout BYD calls CTP (cell-to-pack). Skipping the usual module layer lets the cells fill more of the pack, and BYD claims 50% better space use. BYD launched the design in March 2020.
BYD says LFP is safer than conventional lithium-ion chemistry and substantially cobalt-free. In its nail penetration test, where a nail is driven through a cell to simulate an internal short circuit, BYD reports no smoke or fire and a surface temperature of 30 to 60°C.
Battery sizes by version
| Version | Battery | Market note |
|---|---|---|
| Classic, smaller battery | 49.92 kWh (50.12 kWh in China) | Australian Standard Range, later Essential |
| Classic, larger battery | 60.48 kWh | Australian Extended Range, later Premium |
| Evo Dynamic (FWD) | 60.48 kWh | Australia from September 2026 |
| Evo Premium (RWD) | 74.88 kWh | Australia from September 2026 |
The trim name alone does not identify the battery. In Australia, 'Premium' meant the 60.48 kWh classic car until September 2026 and now means the 74.88 kWh Evo, so the kWh figure on the spec sheet or window sticker is the one to check.
Charging to 100%
The usual EV advice to stop at 80% does not apply to the Atto 3 in the same way, because BYD's guidance for its LFP pack allows full charges. Zecar reports that BYD recommends a 100% charge limit for daily use. A UK BYD dealer says charging to 100% causes no problems, and advises a full charge from a low level every three to six months. The sources differ on how often, so the owner's manual for the specific car is the reference.
Battery warranty
In Australia, BYD covers the high-voltage battery for 8 years or 160,000 km, whichever comes first, with at least 70% of capacity retained. Other markets set their own terms. On a used car, the remaining battery cover is worth confirming before purchase. The charging, range, and ownership pages cover the rest of daily use.
Battery replacement cost
BYD Australia does not publish a price for a replacement high-voltage battery, and no major outlet had reported a dealer quote when this page was checked. The prices quoted online come from parts and accessory sellers, so this page does not repeat them. Under the warranty, BYD repairs or replaces a failed pack with a new, reconditioned, or remanufactured part, at its discretion. BYD also guarantees that the replacement has at least the capacity the original battery had before it failed.
Replacements under warranty have happened. Revolted reports "a documented case of a 60kWh pack replaced free with a loaner car provided". So, on a used car, the remaining battery cover matters more than an out-of-warranty price that nobody has published. The used Atto 3 page covers how to check the battery before buying.
12V battery
Besides the high-voltage pack, the Atto 3 has a small 12V battery that powers the electronics and wakes the car. BYD's 2022 owner's manual describes a lead-acid battery, and CarExpert's 2025 review lists its warranty as 1 year or 20,000 km. The Evo handbook describes a low-voltage battery that is "different from an ordinary lead-acid battery", with its own power manager. BYD's 2026 warranty handbook gives 12 months or 20,000 km for lead-acid starting batteries and lists no term for other types.
The car charges the 12V battery from the high-voltage pack when it runs low. Even so, owners of 2022 to 2024 cars report the 12V battery going flat and the car becoming unresponsive, and no Australian recall covers the fault. Revolted puts a replacement at "a couple of hundred dollars and an hour", and says almost every car of that age needs one.
On an Evo that will not wake after long parking, the handbook says to hold the key near the driver's door and press the door's microswitch. It also warns against jump-starting the car from a petrol or diesel car, and a jump start goes through a dedicated terminal under the hood. The ownership page covers servicing.
Sources
Figures checked in September 2026. This site is independent of BYD.
- BYD Europe: BYD's Blade Battery, all you need to know
- BYD Australia: BYD Atto 3 2025 spec sheet
- BYD Australia: BYD Atto 3 Evo
- CarExpert: 2026 BYD Atto 3 Evo prices (12 August 2026)
- CarExpert: BYD Atto 3 Australian warranty and service prices
- BYD Australia: Warranty and Service Handbook (January 2026)
- BYD Australia: BYD Atto 3 Owner's Handbook (2022)
- BYD Australia: Atto 3 Evo Premium Owner's Handbook
- CarExpert: 2025 BYD Atto 3 review (1 February 2025)
- Revolted: Used BYD Atto 3 Australia buyer's guide (13 April 2026)
- Zecar: Common BYD Atto 3 problems (25 September 2024)
- CarNewsChina: BYD Yuan Plus 2025 specifications
- Zecar: BYD Atto 3 charging guide (28 February 2026)
- City West Country: BYD Atto 3 charging guide