CATL unveils new 5C battery that keeps 80% after 3,000 cycles

CATL has recently introduced a new battery for electric vehicles that it says could fundamentally change one of the biggest sticking points in electric mobility: battery degradation linked to fast charging.

CATL targets ultra-fast charging with minimal battery degradation

In what it describes as ideal conditions, with ambient temperatures around 20 °C, CATL states that this battery can still hold 80% capacity after 3,000 full charge-and-discharge cycles-even when it is regularly subjected to ultra-fast charging.

Put into real-world terms, CATL suggests those figures translate to roughly 1.8 million kilometres of use on average. The company also argues, as highlighted in its launch video, that the battery is likely to last longer than the vehicle it powers.

The results are still strong in more extreme scenarios. At 60 °C, CATL claims the battery retains 80% capacity after 1,400 cycles. That equates, on average, to about 840,000 kilometres of durability, which the company positions as well above solutions currently in production.

CATL also says the new battery carries a 5C rating, which refers to its charge or discharge rate relative to total capacity. In practical terms, that would theoretically allow a full charge in one fifth of an hour-around 12 minutes.

Achieving such high charging rates brings significant engineering hurdles, particularly given the thermal and structural stresses placed on every component when charging this quickly.

New chemistry focused on durability

CATL attributes this performance leap to three key innovations. First, it has developed a denser, more uniform cathode coating designed to reduce structural wear and limit the loss of metal ions during demanding charge cycles. Second, it uses a proprietary electrolyte additive that can detect and seal internal micro-cracks, helping to reduce irreversible lithium loss over time.

Third, the company has added a temperature-responsive coating on the cell separator. When local temperatures rise, this layer slows ion movement, acting as a self-regulating thermal mechanism and lowering the risk of instability.

Beyond the cell itself, CATL has also updated the battery management system. The new approach can route cooling liquid to specific areas of the cell pack where thermal spikes occur. According to CATL, this improves temperature consistency across the pack and extends the service life of the entire assembly.

Deployment timeline and likely first uses

For now, CATL has not confirmed when the battery will enter production or which models will be first to use it. Even so, the Chinese manufacturer points to early deployment in high-utilisation vehicles-such as electric lorries, taxis, or transport fleets-before wider adoption across the passenger car market.