Closed hardware
UBTech Walker S (S1 / S2)
UBTech Robotics · Humanoid · active · 2023
Industrial humanoid line for factory work; the Walker S2 (July 2025) autonomously swaps its own battery in about 3 minutes.
Two ways to get UBTech Walker S (S1 / S2)
Compare all →- Drawing
- /ubtech/walker-s
- Maker
- UBTech Robotics
- Country
- Shenzhen, CN
- Package rev
- none
- Level
- L0 Indexed
- Availability
- Buy
- Openness
- 0/100
- HW licence
- unknown
- Last checked
- 2026-09-24
- Actuators
- Servo joints with force feedback
The original Walker S (2023, about 1.7 m, 41 servo joints) was deployed at a Nio factory in Feb 2024. Walker S2 was unveiled July 17, 2025 and is the mass-production model, with deliveries reported from Nov 2025. Third-party sites claim 176 cm / 70+ kg / 52 DOF for S2, but the maker page does not confirm those figures. UBTech is HKEX-listed (9880).
Build · not possible
Build it. Buy it, or build something like it.
Closed hardware. Buy link only.
- Availability
- Buy
- Indicative price
- unknown
- Price note
- No list price. Orders for Walker S2 reportedly exceeded 800M yuan (~US$112M).
Open robots of similar size you can build
- Berkeley Humanoid Lite/berkeley/humanoid-lite · same class, size unknownL2
- Dropbear/hyperspawn/dropbear · same class, size unknownL2
- Fourier N1/fourier/n1 · same class, size unknownL2
- ToddlerBot/stanford/toddlerbot · same class, size unknownL2
Nearest by height and mass where both are known; otherwise same class. Size comparison only, not capability.
Level gate
Holds L0 · evidence, not confidence- L0Indexed
Known to exist. Atlas page only.
- 3 sources on record(met)
- L1Compiled
Package validates against the spec; every fact has a source.
- No build package compiled(not met)
- 3 sources across robot and package(met)
- L2Sim-verified
Loads in browser and GPU sim, mass within tolerance of the BOM, holds a stand. Unlocks .training.
- No public URDF/MJCF(not met)
- Sim load, mass tolerance and stand are checked on .training(checked elsewhere)
- L3Sourced
Every BOM line resolves to a live offer in at least two regions. Unlocks the one-click cart.
- Not reachable: no open hardware to source or build.
- L4Built
At least one community build report with photos and bring-up logs. Unlocks Build it as the main action.
- Not reachable: no open hardware to source or build.
- L5Certified
The robot's maintainer signs the package. Unlocks certified teams and kit sales.
- Not reachable: no open hardware to source or build.
Levels are cumulative and set by the registry from reviewed evidence. This panel shows what can be measured from the package today.
Same robot, other verbs
- Know ithumanoidrobots.systems/ubtech/walker-s
- Build ithumanoidrobot.buildClosed hardware. Buy link only.
- Train ithumanoidrobots.trainingNo public URDF or MJCF.
- Find its crewpartialhumanoidrobots.team/ubtech/walker-sOwners and labs, not builders.
- See it on the mappartialhumanoidrobots.earth/ubtech/walker-sOwned units, not builds.
Revisions and sources
Every fact on this sheet traces to one of these| Rev | Description | Checked |
|---|---|---|
| PKG | No build package compiled | — |
| S1 | UBTech Walker S2 pageubtrobot.com | 2026-09-24 |
| S2 | CnEVPost Walker S2 battery swapcnevpost.com | 2026-09-24 |
| S3 | UBTech Walker S pageubtrobot.com | 2026-09-24 |