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Tesla’s ‘skunkworks lab’ for its custom battery cell pilot production line is growing
Tesla’s Battery Day may still be a couple of months away, but hints about the highly-anticipated event’s details are already abounding. With Elon Musk specifically mentioning that the event will be held in Fremont, and that it will include a tour of the company’s pilot battery cell production line, it appears that previous reports, which point to a “skunkworks lab” in the city, were accurate. What’s more, documents filed by the electric car maker in previous months seem to indicate that its mysterious pilot battery cell facility is growing.
Initial leaks and reports about Tesla’s mysterious “skunkworks lab” were posted as early as June 2019, with a CNBC article stating that the facility is located at Kato Road, just a few minutes away from the Fremont factory, where the Model S, Model 3, Model X, and Model Y are built. Citing former and current Tesla employees, the news agency stated that Tesla’s R&D teams were focused on prototyping and designing advanced lithium-ion batteries, as well as new equipment and processes that could usher in the mass production of the next-gen cells.
These batteries are now widely speculated to be the million-mile battery that has been mentioned by the company. The million-mile battery is a significant part of Tesla’s game plan, being the one defining factor that could help electric vehicles achieve price parity with gas powered cars, and allow battery storage devices to last decades when deployed. Amidst the wait for Battery Day, speculations are abounding that Tesla will be conducting a deep dive into its million-mile batteries during the event, similar to how Autonomy Day included an in-depth discussion on the company’s custom Hardware 3.0 computer.
As it turned out, Tesla’s skunkworks lab at Kato Road has been very busy this year. A proposal submitted last March, for example, outlines plans to redevelop the existing site by adding floors to the facility. According to Tesla, the redesigned building will be housing 45 research and development employees and up to 425 manufacturing workers that are spread through several shifts from Monday through Friday. This appears to suggest that the company, as early as March this year, was looking to ramp the battery cell output of its pilot production line.
Interestingly enough, Tesla has also been posting multiple job listings on its Careers page that were specifically focused on battery cell manufacturing. By May 2020, Tesla had posted job listings for Cell Engineers, Production Process Engineers, and Controls Engineers. A look at these listings would show references to a battery cell manufacturing operations, and as luck would have it, the posts listed Fremont, California as their location.
Further documents show that Tesla had also requested to increase its power demand by 6 MW, further hinting that activities in the site are poised to ramp soon. This proposal, based on a response from PG&E that was recently shared online, was approved.
Based on these filings and job listings, it is evident that Tesla’s pilot battery cell manufacturing line has been ramping, or at least is poised to ramp, its operations. This is particularly impressive, considering that the Kato Road facility, which reportedly hosts the company’s skunkworks lab, is a fairly small site, comprising of two buildings that cover 184,880 sq. ft. combined. This means that even in this relatively small location, Tesla has been able to create a pilot line for a new breed of batteries that can change the EV game. This is quite a significant accomplishment, considering that previous battery lines are known to consume a lot of space.
Tesla’s Gigafactory Nevada facility is the perfect example of this. Giga Nevada primarily produces battery cells, and it is poised to be one of the largest buildings in the world by footprint once it’s complete. If Tesla’s pilot battery cell production line in Kato Road is indeed fully functional and ramped, then one can only imagine how much more batteries facilities like Gigafactory Nevada can produce with the company’s next-generation technology.
Tesla’s proposal for an expansion of its Kato Road facility could be accessed below.
Tesla Kato Road Update by Simon Alvarez on Scribd
H/T JPR007
Tesla owners have long griped about the wireless phone charger in the Model Y and other vehicles. It often turns smartphones into miniature ovens rather than reliably topping them up.
Software engineer and Model Y owner Michał Gapiński tackled this issue head-on with a clever DIY upgrade, swapping the cooled wireless charger pad from the China-made Model YL in for the one that came standard in his vehicle.
There are several key differences between the U.S.-built Model Y’s wireless charging pad and the one that Tesla has been installing in the Model YL. The one installed in U.S.-built vehicles lacks active cooling and relies on basic heat dissipation, leading to rapid temperature buildup during charging. In contrast, the Model YL integrates a small fan for active cooling.
Will it fit? Fingers crossed, I want a first YL charger deployed in the regular juniper pic.twitter.com/wWDqSNFVkW
— Michał Gapiński (@mikegapinski) June 2, 2026
This design maintains lower temperatures even in warm ambient conditions, though it does not support faster Qi2 charging on iPhones. The connector matches exactly, making physical swaps feasible on compatible consoles, but coding is required to enable full functionality.
Owners in the U.S. have complained about the wireless charging pad, with many reporting that overheating is fairly common. Within 20 or 30 minutes of placing a phone on the wireless charging pad, many have reported overheating messages on their phones, which halt charging and essentially turn the pad into a fancy place to rest your phone.
Many owners have opted to simply plug their phones into a charging cord. Tesla has acknowledged the problem by releasing several solutions for owners, including a relatively new feature that allows you to simply turn off the charging and simply act as a holder for your phone while driving.
Gapiński said that he sourced the cooled pad affordably from China, and it cost under $200 for the part.
He removed the existing console charger, swapped in the new unit, confirming a perfect connector fit, and handled the trim differences. Since the parameter isn’t fully secured, he enabled it through custom coding outside official Toolbox.
Connector is identical, she fits, now time to code it. https://t.co/Y9idgDrpCq pic.twitter.com/uwwgq6blg7
— Michał Gapiński (@mikegapinski) June 2, 2026
The fan activates quietly, blending with AC and seat cooling. He reported the installation was effective and the wireless charging pad worked perfectly; it even kept the phone cool as it stayed at just 86 degrees Fahrenheit. Many times, the wireless charging pad will bring the phone’s temperature well above 100 degrees, sometimes even being relatively hot to the touch.
The retrofit worked, no issues. First Model Y with a cooled wireless charger! No QI2/faster charging on the iPhone but it does not boil the phone even when it is 30 degrees outside.
The fan kicks in, it is not audible especially with the air conditioning and seat cooling. The… https://t.co/JOyR8Tb1Yo pic.twitter.com/kJcYhQIlYq
— Michał Gapiński (@mikegapinski) June 2, 2026
This retrofit highlighted an elegant, owner-driven solution to a factory shortcoming. It is expected that Tesla will begin installing the cooled charging pads into new cars in the U.S. soon, and hopefully, it will offer some sort of retrofit service or kit to owners here who want to use the charging pad effectively.
For those who love to tinker, it’s an accessible upgrade, proving that innovation thrives beyond the production line.
The Tesla Roadster unveiling could be coming “in a few weeks,” according to the company’s Chief Designer Franz von Holzhausen, who said at the Tesla Takeover Europe Event in Austria that the all-electric hypercar could finally make its way to the production line after years of anticipation.
Von Holzhausen delivered the news just days after The Information reported that Tesla planned to push the Roadster unveiling to August. It was slated for both April and May of this year, but now it seems the company is leaning toward a late Summer event to cap off the heat with perhaps its most anticipated vehicle of all-time.
🚨 Tesla Chief Designer Franz Von Holzhausen, speaking to the crowd at Tesla Takeover Europe, said at the event that the Roadster is coming “in a few weeks,”
Multiple attendees have confirmed this pic.twitter.com/B1v6yb2Geq
— TESLARATI (@Teslarati) June 6, 2026
Franz has been with Tesla since 2008, and has played a pivotal role in the iconic design language the company has utilized with its vehicles. Speaking to the crowd in Austria virtually, von Holzhausen’s comments injected fresh excitement into a project that has been plagued by delays for nine years.
The second-generation Roadster promises to redefine supercar standards. Tesla’s website still highlights ambitious targets: 0-60 mph in under 1.9 seconds (with optional SpaceX thruster pack potentially achieving 1.1 seconds or less), a top speed exceeding 250 mph, and a range of about 620 miles.
Equipped with a tri-motor all-wheel-drive setup delivering over 1,000 horsepower, the four-seater aims to blend blistering acceleration, everyday usability, and innovative features like cold gas thrusters for short-hop capabilities, technology that will combine the project with SpaceX.
But years after the company promised to start production, which was slated for 2020, the timeline for the Roadster has continued to shift.
Tesla has strung along those who have put $50,000 deposits down, as well as fans and enthusiasts of the company who have been long awaiting the company to bring forth a car truly designed for the human driver, and not autonomy. The Roadster is more than just a halo vehicle for Tesla; it showcases the company’s ability to push the boundaries while incorporating synergies from other Musk companies.
However, it has to make it to production, which is something Musk and Co. have pushed back repeatedly.
As Tesla navigates Robotaxi development and broader autonomy goals, the Roadster serves as a reminder of its performance roots. If von Holzhausen’s timeline holds, fans could witness this engineering marvel by late June or early July 2026. Whether a full unveiling, demo, or initial deliveries, it marks a milestone for electric supercars.
Tesla has reportedly pushed the unveiling of the Roadster once again, but there are also evidently new details about the event that the company plans to show off.
The Information reported this morning that Tesla will now unveil, for the second time, the next-generation Roadster in August, a further delay from the multiple timeline that the company had previously stated.
The report has not been confirmed or denied by Tesla at any capacity.
It also states the unveiling event will take place in Texas, the same place that Tesla executives revealed in May would be the place of manufacture for the company’s highly-anticipated supercar, which boasts a top speed of over 250 MPH and 650 miles of range, according to its website.
Tesla is also expected to showcase the SpaceX package, which will be used for faster acceleration and potentially hovering capabilities, at the unveiling event, the report states. Musk has always planned for this to happen, but now it seems it is more realistic than ever
The report also states the Roadster unveiling is planned for August pic.twitter.com/By26XZIJzU
— TESLARATI (@Teslarati) June 5, 2026
The Roadster has had its unveiling date and manufacturing date pushed back on many occasions. It was set to start production in 2020, but the COVID-19 pandemic crippled supply chain operations, forcing Tesla to push its timeline back considerably.
However, COVID has been over for some time, and Tesla has still not managed to successfully schedule and execute an unveiling event, which is something fans and enthusiasts, as well as those who have put down a $50,000 deposit, have been waiting for.
The vehicle was close to completion last year, but Musk truly wanted Lars Moravy and Franz von Holzhausen to push the limits of the Roadster. In July of last year, Moravy said:
“Roadster is definitely in development. We did talk about it last Sunday night. We are gearing up for a super cool demo. It’s going to be mind-blowing; We showed Elon some cool demos last week of the tech we’ve been working on, and he got a little excited.”
It is important to note two things: Tesla has not confirmed these details, and the company has regularly pushed these dates back. Until Tesla sends out formal invitations with a concrete date, taking any unveiling event reports with a grain of salt is a good idea.
Tesla owner fixes common feature complaint with crafty DIY retrofit
Tesla exec says Roadster unveil is soon — for real this time
