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Tesla’s ‘Roadrunner’ facility gets a neighbor working on tech beyond the million-mile battery

(Credit: Living with Intent/YouTube)

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As the wait for Tesla’s Battery Day continues, more and more speculations are abounding about what the electric car maker might reveal during the highly-anticipated event. Elon Musk has stated that Battery Day’s announcements will be mind-blowing, and based on apparent clues recently observed by the Tesla community, it appears that the CEO may be right on the money. 

Recent reports have indicated that Amprius, a battery company currently working on silicon nanowire tech, recently relocated its headquarters to a site that’s just a few hundred feet away from Tesla’s Roadrunner battery facility in Kato Road, Fremont. Considering the firm’s focus, its new headquarters’ rather convenient location, and Elon Musk’s previous references to the use of silicon in batteries, there seems to be a fair chance that Amprius’ move to Fremont may be more than a coincidence. 

https://twitter.com/Mars4x4/status/1297723146498260995?s=20

Amprius notes that it is working on creating silicon nanowires for battery anodes that dramatically improve battery weight and density. The company’s website notes that silicon generally has about 10x the capacity of graphite (carbon), but it has a big drawback in the way that it swells when it’s charged, causing the silicon to fracture. To address this, Amprius utilizes silicon nanowires, which keeps the silicon from fracturing and breaking apart even when it swells. 

As noted by EV enthusiast and YouTube host Driving Delta, Elon Musk himself appears to be teasing the use of advanced silicon tech on Twitter last month. In one of his posts, Musk shared some lyrics of the song “Lithium” by Nirvana, whose refrain includes sections that state “I’m not gonna crack.” Granted, Musk may simply be trolling the Tesla community with his posts, but it should be noted that he also talked about the increasing use of silicon anodes five years ago. 

“We’re shifting the cell chemistry for the upgrade battery pack to partially use silicon in the anode. This is just a sort of baby step in the direction of using silicon in the anode. We’re still primarily using synthetic graphite, but over time, we’ll be using increasing amounts of silicon in the anode,” Musk noted during a 2015 conference call. 

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As noted by Amprius’ on its website, the use of 100% silicon paves the way for batteries with the highest energy density, perhaps even at the 500 Wh/kg level. That’s enough to start exploring electric VTOL projects, a topic that Elon Musk has admitted is something that truly interests him. That being said, Professor in Energy Materials and Technologies Ying Shirley Meng, who has made significant contributions to Maxwell Technologies’ battery tech herself, believes that challenges still remain in the use of silicon nanowires. 

“We should pay attention to the cost per kg. Even (if) those nanowires work (which I doubt), to produce consistent quality in metric ton scale at 10$ per kg it will be sci-fi for now,” she noted.

Elon Musk, for his part, recently stated that the technology that could allow 400 Wh/kg with a high life cycle and volume production is not too far away. Musk gave a rough timeframe for the technology, stating that such milestones could be achieved in about three to four years. 

Tesla’s Battery Day event is expected to introduce the company’s next-generation lithium-ion cells, though speculations suggest that these batteries — which are expected to last a million miles — are based largely on Maxwell Technologies’ dry electrode tech. Maxwell itself has previously noted that it could offer batteries with 300 Wh/kg while stating that it had also identified a path to 500 Wh/kg. With this in mind, it appears that Tesla may already be setting the stage for cells that will likely go even beyond the million-mile battery

Granted, Amprius’ move to Fremont may be unconnected to Tesla. That being said, the two companies’ goals to align with each other, and Elon Musk’s own references to the use of silicon suggests that Tesla will likely get a lot of value from Amprius’ tech. If speculations prove true, the path to batteries that go even further than the million-mile mark may be feasible in the near future. Such innovations are key to Tesla’s goal of accelerating the transition to sustainable energy, after all. 

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Watch these recent takes on the Amprius rumors in the videos below. 

https://youtu.be/zAEO3Xyv1YY

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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Elon Musk

Tesla Optimus’ pilot line will already have an incredible annual output

And this would just be the beginning. In the future, Musk mused that Optimus’ production could literally be out of this world.

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(Credit: Tesla)

During the 2025 Tesla Annual Shareholder Meeting, Elon Musk provided a teaser of the company’s targets for Optimus’s annual production. As per the CEO, Optimus’ pilot line will be capable of producing up to one million units annually. 

And this would just be the beginning. In the future, Musk mused that Optimus’ production could literally be out of this world.

Musk targets world’s fastest production ramp for Optimus robots

Tesla’s first Optimus line will be built in Fremont, California, and is projected to produce around one million robots per year. Other facilities like Gigafactory Texas could scale Optimus production to 10 million units annually. Musk even joked that a 100-million-unit line might one day be built “on Mars.” With Optimus, Musk stated that Tesla is looking to achieve a historic production ramp. 

“So we’re going to launch on the fastest production ramp of any product of any large complex manufactured product ever, starting with building a one million unit production line in Fremont. And that’s Line One. And then a 10-million-unit-per-year production line here (at Giga Texas). I don’t know where we’re going to put the one hundred million unit production line, maybe on Mars. But I think it’s going to literally get to one hundred million a year, maybe even a billion a year,” Musk said.

Optimus and sustainable abundance

Tesla’s Master Plan Part IV is all about sustainable abundance, and Musk highlighted that the humanoid robot will play a huge role in his vision for the future. He noted that Optimus’ mass production could redefine economic and social systems worldwide and open up premium services for everyone across the globe. 

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“People often talk about eliminating poverty or giving everyone amazing medical care. There’s only one way to do that, and that’s with the Optimus robot,” Musk said. “With humanoid robots, you can actually give everyone amazing medical care. In terms of Optimus will be more precise. Optimus will ultimately be better than the best human surgeon with a level of precision that is beyond human… People always talked about eliminating poverty, but actually, Optimus will actually eliminate poverty,” Musk said.

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Ford considers drastic move with F-150 Lightning: ‘The demand is just not there’

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Credit: Ford Motor Company

Ford is considering a drastic move with its F-150 Lightning, which was the best-selling EV pickup on the market last quarter, beating out Tesla’s Cybertruck.

Ford has had a tumultuous entrance into its more expanded electric vehicle strategy over the past several years. At one point, the company was widely considered to be the most invested legacy automaker in the transition to electrification, but as the company has seen some real backtracking in terms of its sales and demand, it is cooling down its commitment.

At the end of Q3, it seemed to already be considering making some moves to cool off its EV ambitions, especially as the $7,500 EV tax credit was removed and it appeared that consumers would be less attracted to its vehicles without this sizeable discount.

Now, according to a new report from the Wall Street Journal, Ford is considering scrapping the F-150 Lightning altogether, as one employee said “the demand is just not there.”

Despite it being the best-selling EV pickup in the U.S. last quarter, the sales simply do not match up with the pricing, and financially, it is not the time to try to dive further into a project that is not making a profit. Ford has been dwindling in its commitment to EVs over the past several quarters, and its profits are reflecting a slowing interest in its electric vehicles.

Simply put, Ford’s combustion engine lineup of pickups in the F-Series is, by far, the best-selling division of trucks globally. Ford brought an awesome product forth with the Lightning, a mirror of the gas-powered F-Series that had a variety of trim levels for whatever the truck would be used for by the consumer.

However, the demand and sales have caused Ford to take a loss on its electric truck: figures from early last year indicated it was losing between $100,000 and $132,000 per vehicle.

It is not an official announcement, as Ford has not publicly said anything regarding its plans for the Lightning at this time.

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Elon Musk

Tesla schedules Roadster unveiling event, and you won’t believe when it is

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Tesla has tentatively scheduled its unveiling event for the Roadster’s next-generation iteration, and you will not believe the date the company picked for it.

Tesla CEO Elon Musk said during the 2025 Annual Shareholders Meeting that the company is aiming for an April 1 demo event.

Yes, April Fools’ Day.

Tesla originally aimed for its “most epic demo” to take place at the end of this year. However, the writing on the wall as 2025 winds down seemed to indicate the company was not quite ready to show off everything it plans to implement into the Roadster.

Its capabilities have been teased quite heavily throughout most of the year, but the biggest hints came last week when Musk appeared on the Joe Rogan Experience Podcast.

He said:

“Whether it’s good or bad, it will be unforgettable. My friend Peter Thiel once reflected that the future was supposed to have flying cars, but we don’t have flying cars. I think if Peter wants a flying car, he should be able to buy one…I think it has a shot at being the most memorable product unveil ever. [It will be unveiled] hopefully before the end of the year. You know, we need to make sure that it works. This is some crazy technology in this car. Let’s just put it this way: if you took all the James Bond cars and combined them, it’s crazier than that.”

The Roadster has been somewhat of a letdown, at least in its newest version, thus far. Tesla has routinely delayed the project, putting those who put lofty down payments on the car in a weird limbo, lost at what to do.

One notable pre-orderer cancelled his reservation last week and got in a spat with Musk about it.

Now that there is a definitive date for the Roadster unveiling, Musk and Co. should have a more definitive cutoff date for features and capabilities. Chief Designer Franz von Holzhausen said earlier this year that when they showed Musk what they had done with the Roadster, the CEO encouraged them to do even more with it.

This delayed things further.

Musk also said he believes production would begin between 12 and 18 months after the unveiling, putting it out sometime in 2027.

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