BYD expands Blade Battery warranty across Europe, including older cars already on the road

BYD’s new warranty just got a serious upgrade, with BYD extending coverage for its Blade Battery across Europe.

The Chinese carmaker has increased the battery warranty to eight years or 250,000km (155,343 miles), and crucially, it applies to cars that are already on the road.

This is a move that’s great news for both new and existing owners.

In a market where long-term battery confidence still matters, that’s a pretty big deal.

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Using a different kind of battery for more longevity

BYD’s new warranty applies to all BYD New Energy Vehicles, including fully electric models and the brand’s Super Hybrids.

Alongside the increased mileage cap, BYD continues to guarantee a minimum battery State of Health (SOH) of 70 percent over the eight-year period.

Previously capped at 150,000km (93,205 miles), BYD’s new warranty puts the carmaker right at the sharp end of battery coverage in Europe.

This is especially good news for high-mileage drivers, fleet users, and anyone planning to keep their car for the long haul.

At the centre of all this is BYD’s Blade Battery, which has become one of the brand’s defining technologies.

Unlike conventional battery packs, the Blade Battery uses lithium iron phosphate (LFP) chemistry.

The carmaker claims that using LFP chemistry prioritizes safety, durability, and sustainability over chasing headline-grabbing energy density figures.

It also avoids the use of nickel and cobalt, reducing environmental impact and supply-chain complexity.

BYD has gone to great lengths to prove the Blade Battery’s resilience

It’s been tested beyond 3,000 charge cycles, which is equivalent to around 1.2 million km (745,645 miles), and subjected to some famously brutal safety tests.

These include nail penetration, extreme overcharging, crushing, saltwater immersion and even exposure to temperatures above 300°C (572°F).

In the nail test, often cited as a worst-case scenario, surface temperatures reportedly stay below 60°C (140°F), far lower than traditional lithium-ion batteries.

The blade-shaped cells also play a structural role in the vehicle, improving rigidity and impact protection while taking up significantly less space than traditional battery modules.

That efficiency helps unlock practical benefits, from generous interior packaging to strong real-world range and fast charging.

For example, the BYD SEAL offers up to 570km (354 miles) of combined-cycle range, while the Sealion 7 Excellence AWD can charge from 30 to 80 percent in just 18 minutes, at up to 230kW.

By extending the upgraded warranty to owners who already have a BYD on the road, the brand is showing that this confidence isn’t just talk.

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