Tesla has been working on the 4680 cell since 2023, with its initial deployment of the structural battery pack Model Y. This was quickly pulled from sales due to lackluster charging performance, but the latest generation of the 4680 cells can now achieve charging speeds of up to 500kW, which is a huge improvement.
However, Tesla has invested in a 4680 new cell design that will help drive down costs to make these vehicles more affordable.
Lowest Price Per kWh
Michael Guilfoy, Tesla’s Director of Cell Manufacturing Operations, mentioned on LinkedIn that Tesla has finally achieved a major milestone with the 4680 cell. One of the goals for 4680 was to bring down the cost per kWh to the lowest of all Tesla’s cells - and as of the end of 2024, they’ve done just that.
The Cybercell - the 2nd generation of the 4680 cell- is now Tesla’s lowest cost per kWh cell, meaning that it is the cheapest to produce for Tesla in terms of assembling the parts that go into a vehicle battery pack.
While the Cybertruck is the only Tesla that using the 4680 right now, the 4680 cell is primed to be Tesla’s primary cell going forward due to cost savings, manufacturing optimizations, and usefulness as part of the vehicle structure.
The 4680 cell also offers significant weight savings while also being more rigid, which allows Tesla to build vehicles in a unique fashion that are far safer than others on the road today.
Of course, 4680 isn’t the only cell Tesla is developing - they’ve got a whole host of other things they’re working on. Tesla is developing four new cell types, with some potentially launching in 2026.
Dry Cathode on the Horizon
Guilfoy also mentioned that this isn’t Tesla Energy’s only achievement this year - there’s more upcoming. One of these is the Dry Cathode tech that will help drive that cost down even further.
Dry Cathode manufacturing removes the toxic solvents and furnace baking processes from the battery manufacturing process, saving time and being more environmentally friendly, but it is a new technology. Tesla has been working on this for quite some time - in fact, since the initial introduction of the 1st generation of 4680 cells back in 2023.
We’re quite excited to see what Tesla will do next with the 4680 and their other future cells. Perhaps it is time for the good old 2170 cell to be laid to rest? That’s something we’ll find out in the near future - as the Model S and Model X Plaid rely upon the 2170 to be able to produce the instantaneous power required to make them so fast - but the 4680 cell in the Cyberbeast can do much the same.
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Tesla’s Vice President of Vehicle Engineering, Lars Moravy, recently took to X and opened the floor for user input. There, he asked the community for features and improvements they’d like to see to make Teslas better heading into 2026.
This post generated thousands of suggestions - and we recapped the best of them. There were also a few that Lars responded to, giving owners hope for some much-requested future changes, so let’s take a look at what may be coming
Lumbar Profile Support
Today, lumbar support is one of the few items that is not saved in the Tesla profile. That means if you have multiple drivers who use the same vehicle, you’re often left adjusting this setting manually, as it retains the setting that was last used. One community member suggested saving your lumbar setting to your profile just like Tesla does for other seat settings.
Lars said making this change seems doable, but it’ll take some engineering magic. The lumbar support isn’t tied to an absolute sensor like the other seat settings. This suggests that Tesla does not have an exact value to save, as it does with other seat functions, but Lars believes Tesla can find a way to save lumbar preferences. Tesla could potentially time how long the motor runs to get to the user’s lumbar setting and save this value.
With that said, it seems the vehicle engineering team may take a look at this one, and we may see it included in a future update.
Model 3 Signal Stalk Retrofit
The move away from traditional stalks in favor of the steering wheel buttons on the Refreshed Model 3 has been a point of debate. While the author is squarely in the camp of steering wheel buttons (at least with the Cybertruck), many dissent and say that the buttons on the Refreshed 3 aren’t as satisfying or easy to use.
Many other drivers also prefer the tactile feel and muscle memory of a physical stalk for signaling. Tesla appears to favor stalks, as they retained the turn signal stalk with the new Model Y. There are also rumors that Tesla is going to reintroduce the turn signal stalk to the Model 3.
If Tesla adds stalks back to the new Model 3, current 2024+ Model 3 owners are still left without stalks. However, a user suggested adding stalks as a retrofit option. Lars said that he would try to consider a retrofitted signal stalk for the Refreshed Model 3, similar to the simplified version in the Refreshed Model Y.
While less definitive than the lumbar support response, it appears that Tesla may at least consider offering a stalk retrofit for the new Model 3. If you’re a lover of signal stalks and can’t wait for Tesla to get an official one - we recommend the Enhauto S3XY Stalks, which are customizable and feel very close to Tesla’s original fit and finish.
With that said, it’s nice to see Tesla incorporating more community feedback into its vehicle design these days. Perhaps one day, they’ll address the infamous auto wipers. They have gotten better, but they’re still not as reliable as what’s available in most other vehicles. With that said, we look forward to the changes that will emerge from these recent conversations.
Sometimes, even with Tesla’s intensive bug-testing regime, bugs manage to make it out into the wild. In this particular case, a European user (@darkwaffle48484 on X) noticed that their 2024 Model 3 was using up more battery than normal while parked. Normally, they noted that the vehicle would lose about 1-2% per week; however, recently, they noticed much larger drops of 3-4% per night.
They monitored their Tesla widget and noticed the car wasn’t entering deep sleep. The widget consistently showed a recent connection time—usually within the past 45 minutes.
Fix Inbound
After discussing the issue with other Tesla owners and realizing it was somewhat widespread, they contacted Tesla Service. The service team confirmed that it was a firmware bug affecting the Telematics Control Unit (TCU), which prevented the vehicle from entering deep sleep mode.
The TCU is essentially the communications hub of your Tesla - and is mounted on the ceiling of newer vehicles such as the Model 3 and the new Model Y. It enables cellular and location services (via GPS) and also handles Wi-Fi and Bluetooth services. Tesla Service stated that this bug is planned to be fixed in update 2025.14.6, although the exact version number could change. However, they confirmed that they are aware of the issue and it is being addressed.
@darkwaffle48484
When the user reached out to Tesla Service, Tesla Service responded with the following (translated from Dutch):
“It has been confirmed that this is a firmware bug. The fix is in one of the next updates. Currently, it is planned for 2025.14.6 (subject to change). Do you have any more questions?”
Potentially Region-Specific
This bug could potentially be region-specific. TCUs often require specific hardware components, such as modems, as well as specific firmware versions that support different regions and cellular providers. These enable Tesla to comply with local cellular standards and regulations and ensure that your vehicle can connect to the networks available in that particular region.
At this point, it’s not clear when the fix will roll out, but given that update 2025.14.1 has practically stopped rolling out, Tesla may be waiting to resume the rollout with update 2025.14.3 or this 2025.14.6 version.
If you’ve noticed this issue and are in a non-European nation, let us know.
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