Elon Musk: Cybercab battery will be cut to 40kWh and production expansion prioritized
On November 7, Elon Musk posted on X that upcoming efficiency improvements will allow Cybercab to use a 40kWh battery pack. He said the vehicle will adopt a liquid silver exterior to avoid the color being too monotonous.
Musk also pointed out that there is a limited number of smart and focused people, and they can only accomplish a limited number of tasks. If Cybertruck's complex production line, supply chain, and engineering resources are maintained and allocated, then these people, factory space, and equipment cannot be used to expand Cybercab at scale. He said Cybercab will profoundly change ground transportation.
This statement responds to previous discussion about battery efficiency. U.S. EPA documents previously showed that Cybercab's battery pack was about 47.6–48kWh, equipped with a single front-drive motor, and had a curb weight of about 3,113 pounds. Musk had previously said that Cybertruck production would be gradually stopped at Tesla's Texas Gigafactory around mid-2027 to free up capacity for Cybercab.
Original source:
Title: Elon Musk X post on Cybercab 40kWh pack and prioritization Publisher: Elon Musk (@elonmusk) Date published: 2026-11-07 URL: https://x.com/elonmusk/status/2119152839813456261 Source type: social media original post Verification: read the original post text this time; cross-checked with EPA document reporting and Musk's previous statement about stopping Cybertruck production Support: statements about the 40kWh battery pack, liquid silver, and diverting talent and capacity to Cybercab
ABAB AI Insight
Musk attributed the reduction in battery capacity from about 48kWh to 40kWh to efficiency improvements, rather than to a simple cut in capacity. EPA data show that the current configuration already achieves relatively high efficiency (about 165Wh/mile unadjusted laboratory data); further reducing battery usage can lower per-vehicle cost and weight, while increasing output with the same battery supply.
Liquid silver is an exterior choice; Musk previously said Cybercab gold symbolized the golden age of transportation. The color adjustment is a product detail and does not change the core specifications.
The resource-allocation part clearly places Cybertruck and Cybercab in a zero-sum competition for talent and factory capacity. Musk had already announced that Cybertruck production would be gradually stopped at Giga Texas around mid-2027 in order to increase Cybercab capacity. This decision reflects the company's view of robotaxis as the priority direction rather than the traditional pickup business.
ABAB News · Laws of cognition
The reduction in battery capacity is described as the result of efficiency improvements, not merely a reduction in features.
Talent and factory space are explicitly identified as scarce resources across product lines.
Cybercab is positioned as the vehicle for transforming ground transportation ahead of Cybertruck.