Autonomous battery swapping
Dual batteries let the robot swap its own battery in about three minutes and switch between dual- and single-battery modes. [1]
UBTech Walker S2
Specs, price & availability · verified Oct 2026
UBTech Walker S2 is a 176 cm, 70 kg biped from UBTech Robotics (China), available to order from Nov 2025 with no published price.
- Price
- Not disclosed
- Height
- 176 cm
- Weight
- 70 kg
- Total DoF
- 52
Last verified Oct 10, 2026
Product overview
About UBTech Walker S2
The Walker S2 is a full-size industrial bipedal humanoid from UBTech Robotics. Its headline feature is an autonomous battery swap: UBTech says the robot can replace its own battery within three minutes and switch between dual- and single-battery modes according to task priority (s1).
UBTech's November 2025 release announced mass production and delivery of a first batch of several hundred full-size Walker S2 units, to be deployed in phases across automotive manufacturing, smart factories, intelligent logistics and data collection (s2). The release says UBTech collaborates with industry players including BYD, Dongfeng Liuzhou Motor, Geely Auto and FAW-Volkswagen Qingdao, and that Walker series orders since early 2025 exceed 800 million yuan (s2). UBTech's 2025 annual report lists 52 degrees of freedom (s6).
The product page gives no price or order option and asks visitors to reach out or become a partner (s1). Its contact section lists inquiry emails by scenario, including cooperate@ubtrobot.com for industrial scenarios (s8).
“Walker S2 is able to swap battery autonomously within 3 minutes.”
Capabilities
Key features
15 kg payload in a 0–1.8 m workspace
UBTech says the robot lifts 15 kg within a 0–1.8 m workspace and has a ±162-degree waist rotation. [1]
Pure RGB binocular stereo vision
Head-mounted RGB stereo cameras use deep-learning depth estimation to build depth maps in real time. [1]
BrainNet 2.0 and Co-Agent
Co-Agent covers intention understanding, task planning, tool use and autonomous anomaly handling on the production line. [2][1]
Mass production since November 2025
UBTech began mass production and delivery in November 2025, aimed at automotive, logistics and data-collection customers. [2]
Hardware profile
Specifications
Official — stated by the manufacturer or organizerReported — stated by a credible third partyEstimated — derived or approximate
Body
Mobility
Power
- Runtime
- 2.5 hOfficial — stated by the manufacturer or organizer[5]Comprehensive runtime; dual batteries can be autonomously swapped in about 3 minutes
Hands & Manipulation
Compute & Sensing
- Onboard compute
- x86 + NVIDIA Jetson Orin; Ubuntu + ROSA 2.0Official — stated by the manufacturer or organizer[5]
- Sensors
- Binocular RGB stereo vision (head), Depth camera, 6-axis force sensor, IMU, Fisheye cameraOfficial — stated by the manufacturer or organizer[1][5]
- AI stack
- BrainNet 2.0 with Co-AgentOfficial — stated by the manufacturer or organizer[1]
Show unknown fields (4)
Mobility
- Peak joint torque
- Not published
- Actuation
- Not published
Power
- Battery
- Not published
- Charge time
- Not published
Official footage
Videos
UBTECH Walker S2 - World's First Mass Delivery of Humanoid Robots
UBTECH Robotics
Quick answers
UBTech Walker S2 FAQ
Can you buy UBTech Walker S2?
UBTech Walker S2 is available through an official sales inquiry rather than a public checkout page. [1][8]
How tall is UBTech Walker S2 and how much does it weigh?
UBTech Walker S2 is 176 cm tall and weighs 70 kg (Excludes dexterous hands. Some distributor material lists 73 kg; a conflicting 43 kg figure is not supported by UBTech's Walker S2 documentation). [1][5]
How fast is UBTech Walker S2?
Its stated maximum speed is 2 m/s; High-speed human-like walking. [1][7]
How long does the UBTech Walker S2 battery last?
The stated runtime is 2.5 hours per charge; Comprehensive runtime; dual batteries can be autonomously swapped in about 3 minutes. [5]
How much can UBTech Walker S2 carry?
The listed payload is 15 kg; Maximum combined payload of both arms; UBTech also states 15 kg handling across a 0-1.8 m workspace. [1][5][6]
How many degrees of freedom does UBTech Walker S2 have?
UBTech Walker S2 has 52 listed degrees of freedom; Official product specifications and UBTech's 2025 annual report list 52 DoF. [1][6]
Who makes UBTech Walker S2?
UBTech Walker S2 is made by UBTech Robotics, based in China. [1]
What is the predecessor or successor of UBTech Walker S2?
UBTech Walker S1 is its predecessor. [1]
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Benchmarks & competitions
No benchmark embodiments or results reference this robot yet.
Related
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Evidence
Sources
- [1]UBTECH Walker S2 product page ↗UBTech Robotics · official · accessed Oct 8, 2026
- [2]UBTECH Humanoid Robot Walker S2 Begins Mass Production and Delivery, with Orders Exceeding 800 Million Yuan ↗UBTech Robotics (via Kyodo News PR Wire) · official · accessed Oct 8, 2026
- [3]UBTech unveils the full size industrial humanoid robot Walker S2 standing 1.76 meters tall ↗Heyup News · press · accessed Oct 8, 2026
- [4]Walker S2 - Humanoid.guide spec listing ↗Humanoid.guide · database · accessed Oct 8, 2026
- [5]Walker S2 Product Manual, version 1.0 (mirror) ↗UBTech Robotics (mirrored by device.report) · official · accessed Oct 8, 2026
- [6]UBTech Robotics Annual Report 2025 ↗UBTech Robotics · official · accessed Oct 8, 2026
- [7]UBTech Robotics Interim Report 2025 ↗UBTech Robotics · official · accessed Oct 8, 2026
- [8]UBTECH company profile and contact section ↗UBTech Robotics · official · accessed Oct 8, 2026