Tesla Cybercab to Get a 40-kWh Pack and a Liquid Silver Finish

AUSTIN, Texas — Tesla's Cybercab is about to get lighter on the inside and shinier on the outside. Elon Musk said over the weekend that efficiency gains will let the two-seat robotaxi run on a smaller 40-kilowatt-hour battery, and that the car will roll out in a new "liquid silver" finish — the latest tuning of a vehicle Tesla is reorganizing its business around.

"There are efficiency improvements coming that will allow for a 40kWh Cybercab pack," Musk wrote on X on Saturday, adding that the robotaxi would be offered in liquid silver so the lineup's colors are "not too monotonous."

Doing More With Fewer Cells

The Cybercabs already carrying passengers on Tesla's Robotaxi network in Austin use a 48-kWh pack. Dropping to 40 kWh while holding the same real-world duty cycle points to exactly the kind of engineering Tesla has chased for years: a vehicle that does identical work with fewer cells, less weight and lower cost. For a car designed to drive all day and earn its keep by the mile, shaving battery mass compounds into better efficiency, lower energy and tire costs, and a cheaper bill of materials per robotaxi.

It also fits the Cybercab's purpose-built philosophy. This is not a repurposed consumer car; it is a ground-up autonomous vehicle with no steering wheel or pedals, and every kilowatt-hour removed without hurting range is margin that scales across a fleet meant to number in the millions.

Clearing the Deck for Cybercab

The battery news lands the same week Tesla confirmed it will wind down Cybertruck production at Gigafactory Texas around the middle of 2027 to free capacity for the Cybercab. Musk framed the move bluntly, arguing that keeping a Cybertruck line, supply chain and engineering team running would pull people and factory space away from scaling the vehicle he says will "PROFOUNDLY transform" transportation on Earth.

The decision has split enthusiasts, some of whom still want a traditional pickup in the range. But Musk's priorities are clear: the Cybercab is the product he is willing to reorganize a factory around. Tesla has already shown the robotaxi to international audiences, including a debut alongside Optimus at the Shanghai import expo, and is racing to get the first cars to customers before year's end.

A Fleet Vehicle, Tuned Like One

Liquid silver may read as a styling footnote, but it is a reminder that the Cybercab is entering real production rather than living as a concept. A fresh color, a lighter pack and a factory being retooled around it all point the same direction. As Teslarati reported, the render of the silver, 40-kWh Cybercab is the clearest sign yet of how quickly Tesla intends to move from robotaxi pilot to mass deployment — and of how aggressively it plans to optimize the economics of every mile.