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Tesla Battery Day can mean doomsday for legacy carmakers shifting to electric
Tesla is expected to hold its Battery Day in April as Elon Musk announced during the company’s Q4 earnings call. The chief executive said the company has a “compelling story” to tell about things that can “blow people’s minds.” These statements do not only pique the interest of the electric vehicle community; they also hint of updates that can spell disaster for legacy car manufacturers trying to catch up with Tesla in the electric vehicle market.
Batteries are key to staying on top of the electric vehicle segment and Tesla is the leader of the pack when it comes to batteries and energy efficiency. This has been validated by organizations such as Consumer Reports and even by competitors who go deep into their pockets and go as far as cutting their workforces to catch Tesla in terms of hardware, software, and battery technology.
Come Tesla Battery Day, the obvious would be made more obvious. Tesla could further widen the gap and set itself apart from the rest, not just as the maker of the Model 3, Model Y, Cybertruck or other vehicles in its lineup but as an energy company.
Mass Production Of Cheaper Batteries
Batteries are among the most expensive components of an electric vehicle. This is true for Tesla and other electric vehicle manufacturers. With pricey batteries, car manufacturers cannot lower prices of their vehicles and therefore cannot encourage the mass adoption of zero-emission cars.
Tesla has reportedly been running its “Roadrunner” secret project that can lead to mass production of battery cells at $100/kWh. According to rumors, Tesla already has a pilot manufacturing line in its Fremont facility that can produce higher-density batteries using technology advancements developed in-house and gained through the Maxwell acquisition. With a $100/kWh battery, the prices of Tesla’s vehicles can be competitive even without government subsidies.
Aside from the Roadrunner project, Tesla has also been setting itself up to succeed in the battery game and dominate the market with its partnerships. It has a long relationship with Panasonic that helped it manufacture batteries in Giga Nevada, but has also signed battery supply agreements with LG Chem and CATL in China.
Battery prices have been going down significantly in the last decade. According to BloombergNEF, the cost of batteries dropped by 13% last year. From $1,100/kWh in 2010, the price went down to around $156.kWh in 2019. This is predicted to come close to the target $100/kWh by 2023. If Tesla achieves the $100/kWH cost sooner than the rest, it will give the company a massive advantage over its competitors and that will eventually lead to better profit margins.
Aside from cheaper batteries, the increased battery production capacity is also key in bringing products such as the all-electric Cybertruck and Tesla Semi to life.
“The thing we’re going to be really focused on is increasing battery production capacity because that’s very fundamental because if you don’t improve battery production capacity, then you end up just shifting unit volume from one product to another and you haven’t actually produced more electric vehicles… make sure we get a very steep ramp in battery production and continue to improve the cost per kilowatt-hour of the batteries,” Musk said during the Q4 2019 earnings call.
Enhanced Tesla Batteries
Tesla already has good batteries through its years of research, experimentation, and partnerships with battery producers. It has invested a good amount of money and effort to make sure it’s leading the battery game.
This advantage is made very clear on how Tesla was able to produce the most efficient electric SUV today in the form of the soon-to-be-released Model Y crossover with an EPA rating of 315 miles per single charge versus the Porsche Taycan with a range of around 200 miles.
With the acquired technologies from companies such as Maxwell and recently a possible purchase of a lithium-ion battery cell specialist startup in Colorado, Tesla demonstrates it’s not stopping its efforts to perfect its battery technology. Maxwell manufactures battery components and ultracapacitors and it’s just a matter of time before Tesla makes use of these technologies.
When asked about Maxwell’s ultracapacitor technology during the Q4 2019 earnings call, Musk said, “It’s an important piece of the puzzle.”
Musk also referenced the Maxwell acquisition during an extensive interview at the Third Row Podcast. “It’s kind of a big deal. Maxwell has a bunch of technologies that if they are applied in the right way I think can have a very big impact,” Musk said during a Third Row Podcast interview.
There are rumors out of China claiming that Tesla may come up with a battery that combines the best traits of Maxwell’s supercapacitors and dry electrode technologies. This could mean batteries that could charge faster, pack more energy density, and last longer.
Controlling Battery Supply
Knowing what works and what doesn’t for electric car batteries puts Tesla on top of the game. Of course, add to that what could be the best battery management system that makes Tesla vehicles among the most efficient if not the best in utilizing their batteries. With the advantage on hardware and software fronts, the thought of Tesla becoming a battery supplier is far from being a crazy idea.
Its competitors such as Audi and Jaguar have recently expressed concerns about their battery supplies as they both depend on LG Chem. Tesla– aside from its partnerships with Panasonic, LG Chem, and CATL — pushes the limit to develop its new battery cells in-house and that opens up a lot of possibilities for Tesla as a business.
“It would be consistent with the mission of Tesla to help other car companies with electric vehicles on the battery and powertrain front, possibly on other fronts. So it’s something we’re open to. We’re definitely open to supplying batteries and powertrains and perhaps other things to other car companies,” Musk was quoted as saying.
Recent job postings for a cell development engineer and equipment development engineers suggest that Tesla might actually be considering the idea of introducing a battery line of its own. But of course, the next-generation batteries would be first used for its vehicle lineup. Once it meets that demand and hits economies of scale, one can only imagine how Tesla could play the important role of supplying batteries to other carmakers.
Whether Tesla would announce cheaper batteries, enhanced electric car batteries, or give updates about its efforts, Battery Day in April will most definitely be worth the wait. For other car manufacturers, time would pause during that day as they listen to what Elon Musk and his team will say. And most likely, after the company talk, other car manufacturers will have to go back to their drawing boards once more in an attempt to catch up.
Elon Musk
Tesla gives the Roadster an official “Go for launch” demonstration date
Tesla teased an October 1 Roadster reveal, reviving years of delayed SpaceX thruster hover promises.
Tesla teased an October 1 event date for its next generation Roadster, posting an image on X Saturday that shows the car lit up like it is sitting on a launch pad, with the date “10.01” stamped across the bottom and the caption “Go for launch.” A countdown clock on Tesla’s Roadster order page now points to the same date, which falls on a Thursday. The company has not said where the event will happen or whether it will be streamed at the moment. Stay with us @Teslarati for live updates.
Go for launch pic.twitter.com/Khu03eiZ04
— Tesla (@Tesla) September 12, 2026
Tesla has since sent formal invitations to reservation holders confirming the event will take place in Waco, Texas, about 90 minutes north of its Austin headquarters, based on a digital ticket shared on X by Sawyer Merritt. Tesla did not name the exact venue, though Waco sits close to SpaceX’s McGregor, Texas, rocket test site, previously reported as the planned location for a Roadster thruster demonstration. The invite sets the reveal for 8:30 p.m. Eastern on October 1, requires RSVPs by midnight on September 16, and limits entry to guests 21 and older. Invitations are non-transferable.
The tease follows nine years of a project defined by unimaginable specs along with slipped dates. Musk first showed the second generation Roadster in November 2017 as a surprise reveal at the end of the Tesla Semi event, promising a 0 to 60 mph time under two seconds, a top speed above 250 mph, 620 miles of range from a 200 kWh battery, and production starting in 2020. At last November’s shareholder meeting, Musk set an April 1 demo date and joked the choice gave him “deniability” if it slipped again, which it did, moving first to late April, then to “a month or so,” then to August.
Tesla Roadster SpaceX Package’s 1.1-second 0-60 mph launch visualized in concept video
Whatever Tesla shows on October 1 is expected to center on the SpaceX developed thruster package Musk has described since 2018. Internally code named A71, a nod to the Lockheed SR-71 Blackbird, the system reportedly uses cold gas thrusters fed by a composite overwrapped pressure vessel, the same tank design SpaceX uses on Falcon 9. Musk has said a thruster equipped Roadster could hit 60 mph in about 1.1 seconds under roughly 2.75 g of launch force, well past the 1.9 second figure quoted for the standard car. That version reportedly will not be street legal and has reportedly been discussed as a limited run sold through a track only program.
The standard Roadster is still expected to carry the original $200,000 base price and $250,000 Founders Series tier, both set when Tesla opened $50,000 and $250,000 reservations in 2017. Tesla VP of Vehicle Engineering Lars Moravy has confirmed production will happen at Gigafactory Texas, with Musk targeting 2027 or 2028, 12 to 18 months after whatever the company demonstrates next month.
Tesla is planning to roll out some pretty significant safety and accident avoidance features with Full Self-Driving version 15, which will be the next major FSD deployment from the company.
Tesla AI lead Ashok Elluswamy used a near-miss this week to preview what the company says is the next leap in Full Self-Driving.
In response to a driver whose car had swerved away from another vehicle pulling out of a parking lot, Elluswamy wrote that he was glad the owner was safe and that “even earlier prediction of hazards, even faster reaction time and overall significantly better safety and collision avoidance” would arrive with FSD v15.
Glad you are safe. Even earlier prediction of hazards, even faster reaction time and overall significantly better safety and collision avoidance coming as part of the next big upgrade (v15).
— Ashok Elluswamy (@aelluswamy) September 11, 2026
The comment landed as Tesla continues to treat software as the primary safety upgrade path. v15 is described internally as a larger architectural step, with a much bigger neural network and tighter coupling between prediction and control.
The company has already begun using early v15 software in some robotaxi operations while rolling out safety features such as Automatic Collision Evasion into current customer cars, allowing the driving stack to intervene even when the driver is in manual control.
Tesla is rolling out a new FSD version with a massive safety addition
Tesla’s published telemetry is the backbone of its safety argument. In recent North American Vehicle Safety Report data, vehicles with FSD (Supervised) engaged traveled roughly 5.1 million to 5.7 million miles between major collisions, defined as airbag-deployment events.
Tesla’s estimate of the U.S. average over the same period is about 699,000 miles per comparable crash. That is the comparison Tesla often frames as roughly seven times fewer major collisions.
A tighter comparison uses the same Tesla fleet. Cars driven manually with active safety features such as automatic emergency braking still recorded a major collision about every 2.1 million miles. Against that baseline, FSD’s advantage shrinks to roughly 2.4 to 2.7 times fewer severe crashes, which independent researchers argue is the more apples-to-apples figure.
European data released in 2026 pointed in the same direction: Tesla reported FSD as 3.5 times safer than manual driving in the Netherlands and 4.1 times fewer collisions than manually driven Teslas with active safety across more than 100 million kilometers in five approved countries.
Those numbers do not settle every debate. NHTSA’s Standing General Order still shows Tesla accounting for the large majority of U.S. Level 2 driver-assist crash reports, in part because the fleet logs far more assisted miles than rivals. Critics also note that Tesla’s “U.S. average” mixes crash definitions and driving mix.
Even so, Tesla’s own same-car comparisons, plus lower rates of automatic emergency braking and harsh maneuvers when FSD is engaged, are the evidence Elluswamy is pointing to when he says v15 will push prediction and collision avoidance further. The claim is not that software already eliminates risk. It is that each major version is meant to widen the gap between the system and an unaided human driver.
Cybertruck
Tesla’s most delayed Cybertruck feature is finally here
Tesla finally links Cybertruck Powershare with Powerwall 3 for extended home backup after years overdue.
Tesla’s Cybertruck can now pair with a Powerwall 3 to keep a house running longer during an outage, a feature the company first promised when the truck launched in November 2023.
The official Cybertruck account posted the update on X Thursday: “Powerwall 3 & I can now power your house together. This extends your home backup by over 3 days, equivalent to 9 additional Powerwalls,” Cybertruck lead engineer Wes Morrill confirmed the rollout separately, calling it the first time a vehicle and a home battery have worked together this way. Powerwall 2 and Powerwall+ compatibility is still coming later this year, per both the Cybertruck account and Morrill.
Powerwall 3 & I can now power your house together⁰ ⁰This extends your home backup by over 3 days, equivalent to 9 additional Powerwalls pic.twitter.com/8G2twIm6AN
— Cybertruck (@cybertruck) September 10, 2026
Powershare itself is not new. Tesla enabled the version that lets Cybertruck power tools, appliances or another EV through its bed outlets when the truck launched in 2023. Home backup through a Powershare Gateway and Universal Wall Connector arrived in 2024, and Tesla extended that support to homes with solar the following year. What has been missing until now is Powershare working alongside an existing Powerwall, instead of functioning as a separate backup source competing for the same job.
The pairing matters because a single Powerwall home battery typically covers a home for about a day, less if usage is heavy or the outage stretches into a heat wave or freeze. A second Powerwall for more backup storage costs several thousand dollars installed. A Cybertruck instead uses a battery the owner already has, one large enough here to add roughly three more days of backup without mounting another unit or booking an installer visit. For households in wildfire, hurricane or winter storm regions where outages run past a day, that keeps the refrigerator and medical equipment running instead of shutting down.
The company told owners in October 2024 that Powerwall integration was coming sometime in 2025. That date passed, and in December 2025 Tesla pushed the target to mid-2026, with Morrill explaining at the time that two grid-forming devices need to negotiate which one manages a home during an outage, and that certifying the process across multiple generations of Powerwall took longer than expected.
For owners who bought Powershare hardware expecting it to work with whatever battery setup they already had, Thursday’s update closes a gap that has shown up repeatedly in owner complaints since Cybertruck deliveries began. Tesla has also rolled out a separate Powershare grid support program in Texas, letting Cybertrucks send power back to the grid during high demand events, so the truck’s role in a home’s energy setup keeps expanding even as individual pieces of it arrive later than promised.
Tesla gives the Roadster an official “Go for launch” demonstration date
Tesla plans big safety improvements for Full Self-Driving v15
