4680 Battery Cell

The 4680 is Tesla's large cylindrical lithium-ion cell, a rechargeable battery that uses lithium ions to carry the charge, and its name is really its tape measure, because the cell is 46 millimeters across and 80 millimeters tall. Tesla revealed it at Battery Day on September 22, 2020, with Elon Musk and co-founder JB Straubel presenting. The idea was not a brand-new chemistry so much as a brand-new strategy: make the cell bigger, make it cheaper to build, and make it part of the car's frame instead of a passenger riding along underneath.

What is the 4680 Cell?

The 4680 is a single steel can not much bigger than a roll of quarters, and Tesla designed it to be built by the hundred million. The plan was to make it the standard cell across Tesla's newer vehicles, starting with the Cybertruck and moving into some Model Y cars, with the Cybercab and the Semi set to follow. The whole point was a cell cheap enough, and made at enough scale, to bring down the price of an electric car and not just its performance.

Why the 4680 Cell Exists

Tesla's earlier small cylindrical cells, the 18650 and then the 2170, had run into a wall. Past a certain point, a small cell costs more for every bit of energy it holds, and building millions of them is slow. So Tesla designed the 4680 to break that cost-and-energy logjam, which is what would let electric cars get cheaper and not just better. The targets Tesla set against the older 2170 were the kind of big leap Battery Day crowds had come to expect.

More energy and more power were what caught people's eye, but the roughly 16 percent range gain and the big drop in cost per kilowatt-hour were the numbers that mattered most for the business. The 4680 is the classic Elon move in physical form: go after the cost curve at the level of physics and manufacturing, not marketing.

How it Works

Four ideas do the heavy lifting. The first is a "tabless" electrode. Instead of a couple of tiny metal tabs carrying current out of the rolled-up foil, the foil connects to the cap along its whole length, which cuts internal resistance and helps the cell shed heat, so it delivers more power and lasts longer. The second and third ideas are the materials: a silicon-rich anode, which is the negative electrode and holds more lithium thanks to the silicon, and a high-nickel cathode, which is the positive electrode. The Gen 2 cathode uses NMC955, roughly 91 percent nickel, 5 percent cobalt, and 4 percent manganese, leaning hard away from expensive cobalt. The fourth idea is the structural pack, where the cells are bonded into a strong slab that is part of the car's frame rather than a tray bolted underneath. The Cybertruck's pack shows it off best, at roughly 123 kilowatt-hours.

The last innovation you cannot see from outside the cell. Normal electrodes are coated as a wet slurry and then baked dry in long, power-hungry ovens, but Tesla's dry-electrode process skips the solvent entirely, which removes the single most energy-hungry step in all of battery making.

The Economics of the 4680 Cell

The payoff is meant to show up in the cost per kilowatt-hour. Tesla committed more than $3.6 billion to a planned 100 gigawatt-hour Nevada factory sized for roughly 1.5 million vehicles a year, and it runs a 40 gigawatt-hour 4680 line plus cathode and lithium refining in Texas. Battery capacity is still one of the biggest limits on how many cars Tesla can build, which is exactly why owning cell manufacturing gives Tesla control over volume, margin, and tariff risk all at once. Making its own cells is also an extra supply line to get around trade barriers, not just a way to a cheaper part.

Current Status of 4680

The early ramp was painfully slow, exactly as Elon has described how production S-curves work: the more new parts and steps there are, the slower the start, and the 4680 had a lot of new parts. The production count shows that story clearly.

The first deliveries came in April 2022 at the Cyber Rodeo opening of Gigafactory Texas. The 50-millionth cell arrived by mid-2024, and the 100-millionth in the third quarter of that year. Then came the breakthrough that mattered most for cost: by the Q4 2025 update, Tesla was making both the anode and the cathode dry-electrode in Austin, and it had begun building battery packs for certain Model Y cars with its own 4680 cells, on a Texas line with 40 gigawatt-hours of installed capacity.

What Comes Next

As of 2026, the 4680 powers every Cybertruck version, on Gen 2 chemistry since March, is going into some Model Y packs, and is set for the Cybercab and the Semi. The bigger move is further up the chain, because Tesla has started ramping its own lithium, cathode, and lithium iron phosphate (LFP) production, which is a lower-cost battery chemistry, and that turns the cell into the anchor of a homegrown supply chain rather than just a single product. With a planned 100 gigawatt-hour Nevada factory sized for roughly 1.5 million vehicles a year, the question now is simply how fast the curve bends.

The Bottom Line

The 4680 is less a single battery than a bet that cheaper electric cars come from reinventing how a cell is made, and not just what goes inside it. That is a classic Elon bet, and it now rides on a production curve that is finally starting to bend the right way.

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