CATL's latest fast-charge battery can go from 10 to 80 percent in 3 minutes and 40 seconds. That's the headline figure from the Shenxing Generation 3 LFP pack, shown at the Beijing Auto Show and covered by Out of Spec Reviews in a direct conversation with one of the system engineers. A full charge from the same starting point takes around 6 minutes and 27 seconds. CATL supplies batteries to more than half the global battery electric vehicle market by volume, so what reaches production here has a real chance of showing up in mainstream vehicles within a few years. The Shenxing Gen 3 represents CATL's most aggressive step yet on charging speed within LFP chemistry.
Two engineering choices drive the speed. At the cell level, CATL reduced internal resistance to 0.25 milliohms, which is about 50 percent lower than the industry average. Less resistance means less heat buildup during a fast charge session, which is the central challenge with high-rate charging. The anode material uses a graphite expansion process that speeds lithium transport through the cell, and the interface layer between electrolyte and anode has been modified to support faster charge rates. At the system level, each cell is cooled not just from the bottom but also laterally in a sandwich structure, allowing heat to dissipate faster than bottom-only cooling permits. The engineer confirmed that dendrite formation and lithium plating are not the primary concerns with this chemistry under normal conditions.
Cold weather performance held up in testing. At minus 30 degrees Celsius, charging only takes about 3 additional minutes versus room temperature operation. CATL uses AC ripple current to pre-heat cells before and during the charge session in cold conditions. Cycle life data shared at the show puts state of health above 90 percent after 1,000 full charge cycles. For a driver charging roughly once per week, that equates to around 20 years of use. Energy density is not maximized in this format, with the engineer acknowledging a tradeoff. A typical large SUV would still fit around 80 kWh of capacity using this design. CATL was also displaying battery swap technology and its Shenxing condensed chemistry, which targets 350 Wh per kilogram for applications prioritizing very long range over charging speed.
Bottom line: Four minutes to 80 percent removes charging time as a practical objection for the vast majority of use cases, and 1,000-cycle durability data above 90 percent state of health is the kind of longevity claim that matters more than peak speed. The question that the cell engineers can't answer is which automakers actually put this into vehicles, and at what price point those vehicles land.