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Tesla’s ‘skunkworks lab’ for its custom battery cell pilot production line is growing

(Credit: CNBC)

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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. 

Tesla’s 2170 battery cells. (Credit: Tesla)

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. 

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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.

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Tesla Kato Road Update by Simon Alvarez on Scribd

H/T JPR007

Simon is an experienced automotive reporter with a passion for electric cars and clean energy. Fascinated by the world envisioned by Elon Musk, he hopes to make it to Mars (at least as a tourist) someday. For stories or tips--or even to just say a simple hello--send a message to his email, simon@teslarati.com or his handle on X, @ResidentSponge.

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Tesla parked 50+ Cybercabs outside its Texas Factory with some crash tested

Dozens of Tesla Cybercabs have been spotted at Giga Texas crash testing facility ahead of launch.

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Tesla Cybercab fleet spotted at Gigafactory Texas [Credit: Joe Tegtmeyer)
Tesla Cybercab fleet spotted at Gigafactory Texas on April 13, 2026 [Credit: Joe Tegtmeyer)

Drone footage captured by longtime Giga Texas observer Joe Tegtmeyer shows over 50 units of Tesla Cybercab at the Austin factory campus, including several units clustered by Tesla’s on-site crash testing facility.

The outbound lot at Gigafactory Texas sits just outside the factory exit and serves as the primary staging area where finished vehicles are held before being loaded onto transport carriers or dispatched for validation testing. On any given day, the lot holds a mix of Model Y and Cybertruck units alongside the growing Tesla Cybercab fleet, as can be seen in the drone footage captured by Joe Tegtmeyer.

Tesla Cybercab fleet spotted at Gigafactory Texas [Credit: Joe Tegtmeyer)

Tesla Cybercab fleet spotted at Gigafactory Texas on April 13, 2026 [Credit: Joe Tegtmeyer)

Roughly 50 Cybercab units are visible across the campus, parked in tight organized rows. Most of the units visible still carry steering wheels and pedals, temporary additions Tesla included to satisfy current safety regulations while the vehicles accumulate real-world data ahead of full regulatory approval for a steering wheel-free design.

Tesla Cybercab fleet spotted at Gigafactory Texas [Credit: Joe Tegtmeyer)

Tesla Cybercab fleet spotted at Gigafactory Texas [Credit: Joe Tegtmeyer)

Tesla operates dedicated Crash Labs at both its Giga Texas and Fremont facilities that are purpose-built for controlled structural crash tests. Historically, automakers begin intensive crash testing roughly one to two months before volume production kicks off. The Cybertruck followed almost exactly that pattern. The Cybercab appears to be on the same track facility that we first saw back in October 2025.

Tesla Cybercab crash test units spotted at Gigafactory Texas [Credit: Joe Tegtmeyer)

Tesla Cybercab crash test units spotted at Gigafactory Texas [Credit: Joe Tegtmeyer)

The first production Cybercab rolled off the Giga Texas line on February 17, 2026. Volume production is now targeted for April. Musk previously wrote on X that “the early production rate will be agonizingly slow, but eventually end up being insanely fast,” and separately stated Tesla is targeting at least 2 million Cybercab units per year. Commercial robotaxi service in Austin is targeted for late 2026.

 

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Tesla 2026 Spring Update drops 12 new features owners have been waiting for

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Tesla announced its Spring 2026 software update, and it’s the most feature-dense seasonal release the company has put out. The update covers twelve named changes spanning FSD, voice AI, safety lighting, dashcam storage, and pet display customization, among other things.

The centerpiece for owners with AI4 hardware is a redesigned Self-Driving app. The new interface lets owners subscribe to Full Self-Driving with a single tap and view ongoing FSD usage stats directly in the vehicle.

Grok gets its biggest in-car upgrade yet. The update adds a “Hey Grok” hands-free wake word along with location-based reminders, so a driver can now say “remind me to pick up groceries when I get home” without touching the screen. Grok first arrived in vehicles in July 2025, but each update has pushed it closer to genuine daily utility. Musk framed the broader vision clearly at Davos in January, saying Tesla is “really moving into a future that is based on autonomy.”

On safety, the update introduces enhanced blind spot warning lights that integrate directly with the cabin’s ambient lighting, building on the blind spot door warning that arrived in update 2026.8.

Dog Mode has been renamed Pet Mode and now lets owners choose a dog, cat, or hedgehog icon and add their pet’s name to the display.

Dashcam retention now extends up to 24 hours, up from the previous one-hour rolling loop, with a permanent save option for any clip. Weather maps now show rain and snow with better color differentiation and include the past hour of precipitation data along the route.

Tesla has now established a clear rhythm of two major OTA pushes per year. As with last year’s Spring update, that cycle started taking shape in 2025 with adaptive headlights and trunk customization. The 2025 Holiday Update then added Grok to the vehicle for the first time. This Spring follows that structure: the Holiday update introduces new architecture, and the Spring update broadens it across the fleet.

Two notable features still did not make it. IFTTT automations, which launched in China earlier this year, were held back from this North American release for unknown reasons, and Apple CarPlay remains absent, reportedly still delayed by iOS 26 and Apple Maps compatibility issues.

Below is the full list of feature updates released by Tesla.

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Tesla launches new Model Y interior option

Produced at Gigafactory Shanghai, the update applies to all five-seat Premium Model Y configurations and started being seen on customer deliveries this week. The move marks the first major interior refresh for the compact crossover since its global debut.

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Credit: Tesla Malaysia | X

Tesla has rolled out a striking new interior choice for its best-selling Model Y in China, replacing the long-familiar white cabin with a fresh option: Zen Grey.

Produced at Gigafactory Shanghai, the update applies to all five-seat Premium Model Y configurations and started being seen on customer deliveries this week. The move marks the first major interior refresh for the compact crossover since its global debut.

The Zen Grey interior swaps the classic black-and-white contrast for a softer, more unified palette. Seats, door panels, and center console trim now feature a warm light-grey tone that covers far more surface area than before.

Previously, black accents on the console, door handles, and lower dashboard are now color-matched in the same pebbled vegan leather, creating a brighter, less clinical cabin.

Tesla describes the material as durable and easy to maintain while delivering a noticeably more premium feel. Early photos and videos from Chinese owners show the new shade reflecting natural light beautifully, giving the spacious Model Y an even airier, more inviting atmosphere without sacrificing the minimalist design customers expect:

The change is not an added-cost upgrade but a direct replacement for the discontinued white interior on Shanghai-built vehicles. Customers configuring a new Model Y in China, Hong Kong, or Macau now see Zen Grey as the default light-colored choice.

The update also flows to export markets supplied by Giga Shanghai, including Australia, New Zealand, South Korea, Japan, and the Philippines. Tesla has used its Chinese factory as an innovation hub before, and executives appear to be testing broader appeal with this subtler, warmer tone that avoids the high-maintenance reputation sometimes associated with bright white leather.

Beyond the interior, the refreshed Model Y from Shanghai includes minor exterior tweaks such as blacked-out badges on some trims and optional dark 20-inch wheels.

These changes arrive as Tesla faces stiff competition from domestic EV makers in its largest market. By refreshing the Model Y’s cabin without raising prices, the company is signaling continued commitment to value and constant improvement.

With over 1.2 million Model Y units already on Chinese roads, the Zen Grey launch gives existing owners a fresh talking point and new buyers another reason to choose Tesla. As deliveries ramp up this month, the updated interior is expected to become the dominant light-colored choice across the Asia-Pacific region.

Tesla has not yet confirmed whether the Zen Grey will reach Fremont, Austin, or Berlin-built Model Ys, but Shanghai’s track record suggests the option could spread quickly if customer feedback remains strong.

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