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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
Tesla Model 3 hits quarter million miles with original battery and motor
The Model 3’s Battery Management System (BMS) shows a State of Health between 88% and 90%.

A Western Australian Tesla Model 3 has captured global attention after racking up an impressive 410,000 kilometers (254,000 miles) on its original battery and motor, while still retaining around 90% of its original battery health.
Long-term Model 3
The 2021 Model 3 Standard Plus, equipped with a 60 kWh lithium iron phosphate (LFP) battery, has been in constant use as an Uber rideshare vehicle. According to Port Kennedy EV specialist EV Workz, the car’s Battery Management System (BMS) shows a State of Health between 88% and 90%.
EV Workz owner Edi Gutmanis shared the findings on Facebook’s Electric Vehicles For Australia page on August 8, and the post quickly went viral. As per Gutmanis, the Model 3’s charging history shows 15,556 kWh delivered via DC fast charging (29% of the total) and 38,012 kWh via AC charging (71% of the total).
Gutmanis also broke down the fuel savings for the Model 3. A petrol car covering the same 410,000 km at 7L/100km and $1.70 per liter would cost an estimated AU$50,000 in fuel. By comparison, charging the Tesla using average commercial rates would be about AU$20,737 and just AU$13,000 if using Western Australia’s EV tariff. That’s a potential refueling saving of roughly $37,000, not including the avoided maintenance costs of an internal combustion engine.
Simple fix
The car came into EV Workz for a driveline “judder” issue, as per a report form EV Central Australia. Gutmanis found the real cause was simply worn motor mount bushes. After seven hours of labor and $130 in parts, “the car drives just as good as the first day it left the dealership,” Gutmanis said.
Gutmanis, whose business also performs EV conversions on classics and 4x4s, says the results aren’t surprising. “We expect this sort of longevity with EV batteries,” he explained, though this is the highest-mileage Model 3 he has encountered in Australia.
News
Mysterious covered Tesla Model Y fleet spotted in Giga Berlin
The vehicles were sighted during a recent drone flyover of the Germany-based Model Y production site.

A fleet of mysterious covered Model Y units has been spotted at the Giga Berlin complex. The vehicles were sighted during a recent drone flyover of the Germany-based Model Y production site.
A mysterious fleet
The mysterious Model Y fleet was sighted by longtime Giga Berlin watcher Tobias Lindh, who has been chronicling the progress and activities of Tesla’s German factory complex for years. During his flyover on August 12, 2025, Lindh noted that he was able to spot a fleet of fully covered Model Y units being gathered in one section of the Giga Berlin site.
The presence of the covered Model Y units caught a lot of attention online, with numerous Tesla watchers speculating if the vehicles were the Model Y L or the yet-to-be-released Model Y Performance. Giga Berlin only produces Model Y units, after all, and both the Model Y L and Model Y Performance are yet to be rolled out by the electric vehicle maker.
Tesla Model Y Performance the Model Y L
The Model Y is Tesla’s best-selling vehicle by a mile, selling so well that it was able to become the world’s best-selling car by volume in 2023. With the changeover to the new Model Y this year, Tesla has only released the vehicle’s updated RWD and AWD versions. The updated Model Y Performance is yet to be released as of writing, though sightings of apparent Model Y Performance units have been reported on social media.
In recent weeks, however, the Model Y news cycle has been dominated by the upcoming release of the Model Y L, an extended wheelbase, six-seat version of the best-selling all-electric crossover. The Model Y L is expected to be produced in Giga Shanghai initially, though Giga Berlin, the Fremont Factory, and Giga Texas are also expected to produce the variant in the near future.
Check out Giga Berlin’s mysterious Model Y fleet in the video below.
News
Ukraine completes first Starlink direct-to-cell test in Eastern Europe
The trial was announced by the Ministry of Digital Transformation and Kyivstar’s parent company Veon, in a press release.

Ukraine’s largest mobile operator, Kyivstar, has completed its first test of Starlink’s Direct to Cell satellite technology, enabling text messages to be sent directly from 4G smartphones without extra hardware.
The trial was announced by the Ministry of Digital Transformation and Kyivstar’s parent company Veon in a press release.
First Eastern Europe field test
The Zhytomyr region hosted the pilot, where Deputy Prime Minister Mykhailo Fedorov and Kyivstar CEO Oleksandr Komarov exchanged texts and even made a brief video call via Starlink’s satellite link in northern Ukraine’s Zhytomyr region.
Veon stated that the test marked Eastern Europe’s first field trial of the technology, which will allow Kyivstar’s 23 million subscribers to stay connected in areas without cellular coverage. The service will debut in fall 2025 with free text messaging during its testing phase.
“Our partnership with Starlink integrates terrestrial networks with satellite platforms, ensuring that nothing stands between our customers and connectivity – not power outages, deserts, mountains, floods, earthquakes, or even landmines,” Veon CEO Kaan Terzioglu stated.
Starlink in Ukraine
Kyivstar signed its Direct to Cell agreement with Starlink in December 2024, about a year after a major cyberattack disrupted service and caused nearly $100 million in damages, as noted in a report from the Kyiv Independent. Starlink technology has been a pivotal part of Ukraine’s defense against Russia in the ongoing conflict.
“Despite all the challenges of wartime, we continue to develop innovative solutions, because reliable communication under any circumstances and in any location is one of our key priorities. Therefore, this Kyivstar project is an example of effective partnership between the state, business, and technology companies, which opens the way to the future of communication without borders,” Mykhailo Fedorov, First Deputy Prime Minister of Ukraine, said.
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