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Tesla can solve an annoying part of its cars’ ownership experience with Maxwell’s supercapacitors
When Tesla acquired Maxwell technologies, the electric vehicle community was appropriately excited. Maxwell, after all, works on projects such as dry battery electrode tech and supercapacitors, both of which are believed to hold a lot of potential in the emerging electric vehicle sector. But as the countdown to the highly-anticipated Battery Day draws near, speculations suggest that Tesla acquired Maxwell mainly due to the company’s dry battery electrode tech, not its supercapacitors. Yet according to Andrey Shigaev, CEO of Geyser Batteries, supercapacitors still hold some potential uses for Tesla’s electric cars.
In a brief interview with Teslarati, Shigaev, whose company is developing batteries that use aqueous (water-based) electrolytes, noted that while supercapacitors will likely not be involved in Tesla’s million-mile battery project, there are already a lot of local tasks in an electric vehicle that could benefit from the use of supercapacitors. Among these is smart air suspension, a feature that is currently used in the Model S and X and is expected for upcoming vehicles like the Cybertruck. But beyond this, the Geyser Batteries CEO mentioned that supercapacitors could also be utilized as a superior alternative to the 12V battery that Tesla uses for its vehicles today.
“The more stuff gets electrified, the more power you need to perform tasks. The most classical thing (that could benefit from supercapacitors) and the number one item for Tesla is the 12V battery. Supercapacitors can handle this task. If you have a high energy battery onboard, then this secondary circuit could be powered by a supercapacitor that is very efficient. It will even have an extremely long life cycle. Supercapacitors are lighter too, saving weight. And they tend to be smaller than a lead-acid battery,” Shigaev said.
Interestingly enough, the earliest versions of the original Tesla Roadster didn’t use a 12V battery. Instead, the company used a portion of the Roadster’s main lithium-ion battery pack to supply 12V for the vehicles’ accessories and lights. This did not prove ideal, however, and in 2010, Tesla switched to using a 12V battery for the Roadster 2.0. It should be noted that the 12V battery, which has been adopted in every vehicle since the Roadster 2.0, is used to keep systems such as emergency blinkers, airbags, seatbelt pre-tensioners, the MCU, and other functions operational even when a car’s main battery pack is compromised.
Being one of the few parts of the car that is still based on conventional automotive tech, the 12V battery in a Tesla tends to last only a few years. As noted by Tesla Tap, the 12V battery in a brand new Tesla could last about 3-4 years, but this could be reduced to as little as 1-2 years if the vehicle is driven frequently. This could cause annoyances among Tesla owners, especially since the 12V battery’s health could not be actively observed in the vehicle’s systems yet. Social media posts about 12V batteries in Teslas giving out are numerous, with some owners noting that it is the one aspect of the Tesla ownership experience that is still mildly infuriating.
With this in mind, the use of supercapacitors in place of the 12V battery could be pretty in-character for Tesla. Nevertheless, the Geyser CEO explained that using supercapacitors in place of the 12V battery would present some challenges as well. Among these is cost, since supercapacitors are notably more expensive than standard 12V lead-acid batteries. Yet despite this, the advantages they bring could justify their use, especially among flagship vehicles like the next-generation Roadster and the Plaid Model S and Model X.

“Supercapacitors have a main caveat. There are three drawbacks. First and foremost is energy density, which is ten times lower than lead-acid battery. Second is their price since currently, their price is astronomically larger. The third is discharge. If you leave it alone for almost one month, it would discharge completely. However, if you have an electric car and there’s a high energy battery in the car like a lithium-ion battery, that would be the power source for the vehicle,” Shigaev noted.
Other industry experts have suggested uses for Maxwell’s supercapacitors in Tesla’s electric cars in the past. Auto veteran and Munro & Associates Sr. Associate Mark Ellis previously noted that apart from dry electrode tech, Tesla could tap into Maxwell’s supercapacitors to improve its vehicles’ battery management systems.
“One of the issues with the battery is, when I step on the throttle hard, I’m pulling a lot of energy from the battery. And then, when I brake hard, I’m pulling a lot of energy out of the regen, but the batteries can’t take it fast enough. The batteries get really stressed when you try to pull it up too much, so if I had supercapacitors that I could use as a cushion; so when I need energy quickly, (I can) pull it from the supercapacitors and then fill the supercapacitors back up with the battery slowly; and then when I brake, I can capture more of that regen energy and do the supercapacitors faster. I think that just makes logical sense, because now all of a sudden I’ve got a sponge in front of my main energy source and I’m not stressing (the battery) so much,” Ellis said.
News
SpaceX is partnering with chipmakers to enable Starlink satellite-to-cell service
President Gwynne Shotwell outlined the effort during a space industry conference in Paris.

SpaceX is working with microchip manufacturers to integrate satellite-connectivity hardware into smartphones, advancing its plan for direct-to-device services through Starlink.
The move follows the company’s $17 billion acquisition of wireless spectrum from EchoStar Corp., a deal that positions SpaceX to operate more independently of traditional telecom carriers.
President Gwynne Shotwell outlined the effort during a space industry conference in Paris this week, as noted in a Bloomberg News report.
Starlink direct-to-device
Starlink currently serves millions of customers in over 100 countries, primarily through ground-based dishes. The company, however, is now expanding into satellite-to-cell service, which should enable unmodified phones to connect directly with orbiting satellites. While SpaceX has a partnership with T-Mobile US, the EchoStar spectrum purchase gives it more control to negotiate with global carriers on its own terms.
“We’re working with chip manufacturers to get the proper chips in phones,” the SpaceX President stated. “We will now be initiating discussions with telcos in a different way now. Now it’s our spectrum, but we want to work with them, almost providing capacity and wholesaling capacity to their customers.”
The company plans to launch satellites capable of supporting its direct-to-device business within two years, with early mobile phone testing expected by late 2026.
Starship program continues test flights
Shotwell also addressed SpaceX’s Starship program, which recently completed its 10th test flight in August. She said the mission met all objectives, providing a critical morale boost to teams after a challenging development year.
“My Starship team needed that win,” Shotwell noted. “Development programs always are kind of a 24/7 operation, and I was really pleased for them.”
SpaceX is planning to fly one more iteration of the current Starship prototype, known as V2, before transitioning to the next-generation V3 vehicle. That version, expected to debut late this year or early 2026, is designed to be more capable and support eventual crewed missions to the Moon and Mars.
“The V3, which we want to fly hopefully late this year, but maybe early next year, is really the vehicle that could take humans to the moon and Mars,” Shotwell stated.
Elon Musk
Elon Musk says xAI has a chance to reach AGI with Grok 5
The comment came after Grok 4 posted strong results on the ARC-AGI benchmark.

Elon Musk suggested this week that his artificial intelligence startup xAI has the potential to reach artificial general intelligence (AGI) with the next version of its large language model, Grok 5.
The comment came after Grok 4 posted strong results on the ARC-AGI benchmark, which tests reasoning and problem-solving ability.
Musk sees Grok 5 as AGI candidate
In a post on X, user @amXFreeze shared the latest results of the ARC-AGI leaderboard, which showed Grok 4 outpacing rival systems such as OpenAI’s ChatGPT in problem-solving and open program synthesis tasks.
Musk reacted to the performance by stating that “I now think xAI has a chance of reaching AGI with Grok 5. Never thought that before.”
Artificial General Intelligence (AGI) refers to an AI system that is capable of matching or surpassing human-level intelligence across tasks such as thinking, reasoning, and other domains by a notable margin, as noted in a report from Benzinga. AI companies today are actively pursuing AGI.
xAI’s speed
While xAI was only established in March 2023, the startup has grown aggressively. Since its founding, it has rapidly risen in the AI segment and its Grok large language model has become a mainstream option for everyday users, especially on social media platform X. The company is still growing aggressively, and it is currently expanding its Colossus supercomputer cluster in Memphis.
During xAI’s Engineering Open House event in San Francisco in its early days, Elon Musk highlighted that speed would be the company’s primary competitive edge. To highlight this, Musk stated that “No SR-71 Blackbird was ever shot down and it only had one strategy: to accelerate.” So far, xAI is definitely playing this role very well.
News
Tesla lands new partnership with Uber as Semi takes center stage
Tesla and Uber will work together, using the company’s all-electric Semi, to make sustainable Class 8 electric trucks more affordable with three main strategies: Subsidized Pricing, Predictable Growth, and Optimization of Utilization.

The Tesla Semi has led to a new partnership between the company and Uber, as the two are launching a program that aims to revolutionize logistics by making sustainable commercial vehicles more accessible.
Uber announced on Tuesday that it was planning to launch the Dedicated EV Fleet Accelerator Program in a new partnership with Tesla. Uber’s Freight division is mainly responsible for the new program, which it calls a “first-of-its-kind buyer’s program designed to make electric freight more affordable and accessible by addressing key adoption barriers.”
Tesla and Uber will work together, using the company’s all-electric Semi, to make sustainable Class 8 electric trucks more affordable with three main strategies: Subsidized Pricing, Predictable Growth, and Optimization of Utilization.
- Subsidized Price: Fleets purchasing Tesla Semis through this program will receive a subsidy on the purchase price.
- Predictable Growth: Fleets will integrate their Tesla Semis into Uber Freight’s dedicated solutions for shippers for a pre-determined period. This creates an opportunity for carriers to forecast revenue with confidence, while shippers gain consistent access to reliable, zero-emission capacity.
- Optimize Utilization: Uber Freight taps into its extensive freight network to match carriers with consistent, high-quality freight from our strong shipper base—helping ensure the addition of these Tesla Semis stay fully utilized and carriers see dedicated, real, measurable returns from the start
Tesla will work directly with interested companies to iron out technical details about the Semi, as well as its cost of ownership based on the tailored needs of their business. Fleets can expect savings on the first day, Uber says, as they will avoid diesel fuel costs and reduced maintenance, a widely known advantage of EVs.
Uber announced that it had partnered with select carriers to pilot the Dedicated EV Fleet Accelerator Program prior to its launch:
“During the 2-month pilot program, the Tesla Semis showcased both reliability and efficiency for Uber Freight’s shipper network. Over 394 hours of drive time, carriers covered 12,377 miles. With an average net energy consumption of just 1.72 kWh per mile and only 60 hours of total charge time, these results highlight the operational viability of Tesla Semis on demanding freight lanes. “
In its press release launching the program, Uber effectively highlights how the use of the Semi can impact a company’s margins and profitability through fuel savings, reduced maintenance costs, and lower total cost of ownership.
This is something that turns so many people away from gas cars and toward EVs, so it’s no surprise that Uber wanted to emphasize this point on a larger scale with a company that utilizes a fleet of vehicles.
Tesla Semi shows strong results in ArcBest’s real-world freight trial
Tesla has been experimenting with a select group of companies, as well. It partnered with PepsiCo. several years ago, in an effort to launch a pilot program for the Semi. It had excellent results, showing higher efficiency, lower costs, and an exceptional ability to handle long runs.
Drivers have had a lot of positive things to say:
The Semi will enter mass production next year, but we anticipate that some companies will commit to Uber’s new platform well before then.
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