

News
Tesla battery researcher Jeff Dahn’s tests hint at li-ion cells breaking the 2M-mile barrier
Last year, the electric vehicle community’s attention was caught when Tesla battery researcher Jeff Dahn and his team published a paper revealing that quality lithium-ion batteries have the capability to last 1 million miles if used in EVs. A recent presentation from the respected battery pioneer has now revealed that these findings may actually be conservative, as the batteries that Dahn and his team have been testing are still going strong, and are now on track to pass the 2-million-mile mark.
Dahn’s updated findings were discussed in a recent video conference for energy storage and sustainable engineering. According to Dahn, the “million-mile” batteries that were referred to in the past year’s paper are now going towards 10,000 to 15,000 cycles. Considering that the million-mile cells were cycled 5,000 times, it is starting to become evident that the lithium-ion batteries that Dahn’s team have been testing have the potential capability to last 3.5 million km or over 2 million miles if used in an electric vehicle.
Remarkably, the lithium-ion cells that are being cycled by Dahn and his team have shown minimal degradation even at this point. With this in mind, there seems to be a good chance that even the study’s “2-million-mile” cells are capable of lasting even longer. Dahn notes that lithium-ion batteries have reached a point where it is becoming imperative to look into the further applications of advanced battery technology, such as vehicle-to-grid, or massive vehicles like airplanes and ferries.
As noted by the team in its 2019 paper, the lithium-ion batteries that it will be using are NMC532 pouch cells obtained from Li-FUN Technology in China. The NMC532 pouch cells are dry batteries as well, using no electrolytes. Interestingly enough, Tesla’s next-generation 4680 cells that the company revealed at Battery Day also utilize dry battery technology developed from the innovations of Maxwell Technologies, a company that the EV maker acquired.
Considering that the batteries which Dahn and his team are testing are just cells acquired from Li-FUN Technology in China, there seems to be a pretty good chance that Tesla’s next-generation 4680 cells could exhibit comparable or even superior performance when they are deployed to the company’s fleet of vehicles and energy storage units in the coming years. If these assumptions prove accurate, then Tesla’s next-generation cells may truly be a class above anything that is being used in the market today. Dahn, for his part, noted that Tesla’s battery strategy is sound.
“Tesla is just moving forward at the speed of light. They are upscaling their factories, they know they need Tera Watt Hours for both energy storage and vehicles, and it’s incredibly exciting times,” he said.
Watch Jeff Dahn’s recent talk about his team’s battery findings in the video below.
Elon Musk
xAI’s Memphis data center receives air permit despite community criticism
xAI welcomed the development in a post on its official xAI Memphis account on X.

Elon Musk’s artificial intelligence startup xAI has secured an air permit from Memphis health officials for its data center project, despite critics’ opposition and pending legal action. The Shelby County Health Department approved the permit this week, allowing xAI to operate 15 mobile gas turbines at its facility.
Air permit granted
The air permit comes after months of protests from Memphis residents and environmental justice advocates, who alleged that xAI violated the Clean Air Act by operating gas turbines without prior approval, as per a report from WIRED.
The Southern Environmental Law Center (SELC) and the NAACP has claimed that xAI installed dozens of gas turbines at its new data campus without acquiring the mandatory Prevention of Significant Deterioration (PSD) permit required for large-scale emission sources.
Local officials previously stated the turbines were considered “temporary” and thus not subject to stricter permitting. xAI applied for an air permit in January 2025, and in June, Memphis Mayor Paul Young acknowledged that the company was operating 21 turbines. SELC, however, has claimed that aerial footage shows the number may be as high as 35.
Critics are not giving up
Civil rights groups have stated that they intend to move forward with legal action. “xAI’s decision to install and operate dozens of polluting gas turbines without any permits or public oversight is a clear violation of the Clean Air Act,” said Patrick Anderson, senior attorney at SELC.
“Over the last year, these turbines have pumped out pollution that threatens the health of Memphis families. This notice paves the way for a lawsuit that can hold xAI accountable for its unlawful refusal to get permits for its gas turbines,” he added.
Sharon Wilson, a certified optical gas imaging thermographer, also described the emissions cloud in Memphis as notable. “I expected to see the typical power plant type of pollution that I see. What I saw was way worse than what I expected,” she said.
News
Tesla FSD user in China shares insights after months of use: “Not a single safety intervention”
Tesla FSD users in China tend to push the system to its absolute limits.

Tesla’s Full Self-Driving (FSD) system appears to be quietly winning over drivers in China. Although its rollout in February 2025 has not been followed by additional notable updates, recent accounts from local drivers suggest that Tesla’s approach to full self-driving may be outperforming its rivals on Chinese roads.
Tesla’s FSD exhibits smooth and cautious performance on real roads
As noted in a post shared by EV watcher @ray4tesla, a driver who has used Tesla’s FSD in China for two months described a well-calibrated, human-like driving experience. The driver also noted that Tesla’s FSD system is very cautious, perhaps even too careful at times.
“On narrow roads, it slows down appropriately; on major roads, it picks up speed. When there are a lot of pedestrians or electric scooters, it’s overly cautious — almost too polite,” the driver wrote.
Even more interestingly, the driver emphasized that despite frequent usage, there has been zero safety interventions since FSD was enabled in the vehicle. “In the two months I’ve been using FSD, I haven’t had even a single safety intervention,” the driver wrote.
Huawei ADS test triggers multiple safety takeovers
The user compared FSD to Huawei’s ADS system, which they tested for about 90 minutes in an Aito M9 SUV. According to the driver, Huawei’s ADS struggled to deliver consistent performance.
“Then I tried the M9 (Huawei ADS) for an hour and a half. When it needed to speed up, it lagged; and on tight, narrow roads, it suddenly accelerated — honestly, it was pretty scary. The acceleration and braking felt jerky, and you could clearly tell it was being driven by a machine (robotic vibe),” the driver wrote.
The user reported four safety interventions with Huawei’s ADS system within just 30 minutes while driving on rough, construction-heavy roads. “In construction zones and on rough roads, there were four safety interventions in just 30 minutes. And if you know what a ‘safety intervention’ means — that’s essentially four near-collisions,” the driver added.
While anecdotal, the account from the Tesla owner is quite significant since FSD users in China tend to push the system to its absolute limits. Since its rollout earlier this year, Tesla drivers in China have been recorded testing FSD on unpaved mountain roads, extremely narrow streets, busy cities, and wooded paths that barely have any road at all, among others.
Elon Musk
Tesla begins expanding Robotaxi access: here’s how you can ride
You can ride in a Tesla Robotaxi by heading to its website and filling out the interest form. The company is hand-picking some of those who have done this to gain access to the fleet.

Tesla has begun expanding Robotaxi access beyond the initial small group it offered rides to in late June, as it launched the driverless platform in Austin, Texas.
The small group of people enjoying the Robotaxi ride-hailing service is now growing, as several Austin-area residents are receiving invitations to test out the platform for themselves.
The first rides took place on June 22, and despite a very small number of very manageable and expected hiccups, Tesla Robotaxi was widely successful with its launch.
Tesla Robotaxi riders tout ‘smooth’ experience in first reviews of driverless service launch
However, Tesla is expanding the availability of the ride-hailing service to those living in Austin and its surrounding areas, hoping to gather more data and provide access to those who will utilize it on a daily basis.
Many of the people Tesla initially invited, including us, are not local to the Austin area.
There are a handful of people who are, but Tesla was evidently looking for more stable data collection, as many of those early invitees headed back to where they live.
The first handful of invitations in the second round of the Robotaxi platform’s Early Access Program are heading out to Austin locals:
I just got a @robotaxi invite! Super excited to go try the service out! pic.twitter.com/n9mN35KKFU
— Ethan McKanna (@ethanmckanna) July 1, 2025
Tesla likely saw an influx of data during the first week, as many traveled far and wide to say they were among the first to test the Robotaxi platform.
Now that the first week and a half of testing is over, Tesla is expanding invites to others. Many of those who have been chosen to gain access to the Robotaxi app and the ride-hailing service state that they simply filled out the interest form on the Robotaxi page of Tesla’s website.
That’s the easiest way you will also gain access, so be sure to fill out that form if you have any interest in riding in Robotaxi.
Tesla will continue to utilize data accumulated from these rides to enable more progress, and eventually, it will lead to even more people being able to hail rides from the driverless platform.
With more success, Tesla will start to phase out some of the Safety Monitors and Supervisors it is using to ensure things run smoothly. CEO Elon Musk said Tesla could start increasing the number of Robotaxis to monitors within the next couple of months.
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