Imagine driving your car the equivalent of a New York-to-Boston round trip every single day for 18 months straight. That's exactly what one Xiaomi SU7 owner in China has done, racking up a staggering 165,000 miles (265,000 kilometers) in just a year and a half. But here's the jaw-dropping part: his battery health still sits at an impressive 94.5%. This real-world endurance test, first reported by CarNewsChina (https://carnewschina.com/2026/02/03/xiaomi-su7-retains-94-5-battery-health-after-265000-km-in-18-months/), challenges everything we thought we knew about electric vehicle battery longevity.
Mr. Feng, the owner of this record-breaking SU7 Pro, averages a mind-boggling 600 km (373 miles) per day. To put that into perspective, it's like driving from Los Angeles to San Francisco and back, daily. When Xiaomi shared the results with him, Feng was as stunned as anyone. “I expected the battery health to drop to 90% at best,” he admitted. “Seeing it at 94.5% was truly astonishing.”
Let’s break down the numbers. Feng’s SU7 Pro is equipped with a 94.3 kWh battery pack, and based on an estimated energy consumption of 18 kWh per 100 km, the battery has completed approximately 506 full charge-discharge cycles. In reality, the number of partial charging cycles is likely much higher, as most EV owners charge their vehicles between 20-80% rather than going from 0 to 100% each time.
And this is the part most people miss: Xiaomi’s battery performance blows industry warranties out of the water. Tesla, for instance, guarantees its Model 3 and Y RWD batteries for 8 years or 100,000 miles with a minimum retained capacity of 70%. Most other manufacturers offer similar warranties, typically covering 8 years or 150,000 km with acceptable degradation of 20-30%. Feng’s SU7 has already surpassed these distance warranties by 65% while losing only 5.5% of its capacity. Is this the future of EV battery technology, or just a one-off success story?
The story went viral after social media user “Jackson’s Sunset Drive” shared a video on Bilibili (https://www.bilibili.com/video/BV1Tm6tBxE86/), racking up millions of views across Chinese platforms. Even Xiaomi CEO Lei Jun took notice, sharing the post on Weibo. But Feng isn’t stopping here—he’s now aiming to hit 600,000 km within three years, pushing the boundaries of what we thought was possible.
“I’ve crunched the numbers,” Feng explained. “Compared to a traditional gasoline vehicle, I’ve saved over 100,000 yuan ($14,300) on fuel costs alone.”
This kind of real-world data is invaluable, far more telling than lab tests or warranty specs. While Xiaomi is a relatively new player in the EV market, having entered only in 2024, this single data point suggests that modern EV batteries, when properly engineered, can far exceed the conservative thresholds set by manufacturers. Of course, one vehicle’s experience doesn’t represent the entire fleet. Battery degradation can vary based on climate, charging habits, and individual cell variation. But it raises a thought-provoking question: Are manufacturers underestimating the capabilities of their own batteries?
The timing of this revelation is particularly noteworthy. Xiaomi’s first-generation SU7 has just ended production, with a refreshed version launching now. For current owners concerned about long-term value, this real-world proof should be incredibly reassuring. But here’s where it gets controversial: If Xiaomi’s batteries are this durable, why aren’t other manufacturers following suit? Could this be a game-changer for the EV industry, or is it too early to tell?
What do you think? Is Xiaomi onto something groundbreaking, or is this just an outlier? Let us know in the comments below!
FTC: We use income-earning auto affiliate links. More. (https://electrek.co/about/#affiliate)
