In a real-world test a Xiaomi SU7 electric car in China has delivered one of the strongest battery durability performances seen so far in the EV market. After traveling 265,000 kilometers (165,000 miles) in just 18 months, the vehicle’s battery health is still measured at an impressive 94.5 percent.
The data was first reported by CarNewsChina and comes from the car’s owner, Mr. Feng, who drives a Xiaomi SU7 Pro under extreme daily conditions. His case is quickly becoming a reference point in discussions about electric vehicle battery life. Moreover, it is relevant to long-term reliability and real-world performance.
Mr. Feng’s driving routine is far from normal. He covers around 600 kilometers (373 miles) every day, roughly equal to a New York–to–Boston round trip. He does this almost every single day. Over 18 months, that level of usage pushed the SU7 Pro far beyond what most private vehicles experience in their entire lifetime.
When Xiaomi technicians checked the battery health, even Feng was surprised. “Xiaomi staff told me the results, and I was genuinely shocked,” he said. “I expected the battery health to be around 90 percent at best. Seeing 94.5 percent was truly surprising.”
Such results stand out because heavy mileage usually accelerates battery degradation, especially in electric vehicles that depend on lithium-ion cells.
The Xiaomi SU7 Pro is equipped with a 94.3 kWh battery pack. Based on an estimated energy consumption of around 18 kWh per 100 kilometers, experts estimate that the battery has gone through roughly 500 full charge-discharge cycles. In reality, the number of partial charging cycles is likely much higher. This is because most EV drivers charge between 20 and 80 percent instead of running the battery to zero.
Mr. Feng’s SU7 Pro has already exceeded those distance benchmarks by more than 65 percent, while losing only about 5.5 percent of its battery capacity.
A video shared on Bilibili by a user known as “Jackson’s Sunset Drive” gathered millions of views across Chinese social media platforms. The attention soon reached the top of Xiaomi’s leadership.
Xiaomi CEO Lei Jun shared the story on Weibo, signaling strong confidence in the company’s EV technology and boosting public interest in the SU7 lineup. This level of endorsement is significant for Xiaomi, a company that only entered the electric vehicle market in 2024.
Beyond battery health, the high-mileage test also shows the economic side of EV ownership. According to Feng, he has already saved more than 100,000 yuan (around $14,300) in fuel costs compared to driving a gasoline car. And he is not planning to slow down. Feng says his next target is to reach 600,000 kilometers (about 370,000 miles) within three years. If successful, this would make him the first known SU7 owner to hit that milestone.
It is important to note that one vehicle does not represent an entire production fleet. Battery degradation can vary due to climate, charging habits, and cell manufacturing differences. Still, this case provides powerful real-world evidence that modern EV batteries can outperform conservative warranty expectations when properly engineered.
The timing also matters. Xiaomi has already ended production of the first-generation SU7, with a refreshed version entering the market. For existing owners and potential buyers, Feng’s experience offers reassurance about long-term value, durability, and reliability.
