TECH – BYD is putting its luxury electric sedan through a test that sounds more like a punishment than a routine durability check. The Yangwang U7 has completed a 30,000-kilometer endurance run in less than nine days, while undergoing more than 350 fast-charging sessions along the way. According to Mobitekno, the test was designed to demonstrate the durability of BYD’s latest Blade Battery 2.0 under unusually demanding conditions.
The test took place in Nanning, southern China, where temperatures exceeded 36°C and humidity reached as high as 80 percent. Throughout the run, the U7 maintained a cruising speed of 240 km/h, while its air conditioning remained set at 24°C. The vehicle completed the 30,000 km journey in 8 days, 19 hours, and 58 minutes, according to BYD.
What makes the result particularly interesting is the condition of the battery afterward. Despite covering 30,000 km and undergoing more than 350 flash-charging sessions, the battery reportedly retained 98.7 percent of its original capacity. That represents a measured reduction of only 1.3 percent, giving BYD a striking figure to highlight as it promotes the durability of Blade Battery 2.0.
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Yangwang General Manager Hu Xiaoqing also emphasized that the test vehicle was not a specially prepared prototype. It was reportedly a standard production U7 randomly selected from a retail showroom. Hu said, “Yangwang welcomes verification and testing from all independent institutions and individuals,” signaling the company’s willingness to have the results examined beyond its own testing program.
The single endurance run was only part of the broader validation effort. Yangwang said it had deployed 758 U7 test vehicles before the model reached the market, collectively accumulating more than 10.49 million kilometers of testing. The updated U7 also offers battery options of 135.5 kWh and 150 kWh, with the larger pack providing a claimed CLTC range of up to 1,006 km.
Still, the 98.7-percent figure should be viewed as a result from this specific manufacturer-run test rather than proof of identical battery degradation in everyday driving. Even so, subjecting a production EV to extreme heat, sustained high-speed operation and hundreds of rapid charges creates a remarkably intense stress test for its battery technology.
