Robotics Videos

Walker S2 changes its battery: Is that enough for 24/7 operation?

Nico Nuss 0

UBTECH promotes the Walker S2 as the first humanoid robot that can change its battery autonomously. The entire mechanical process is basically understandable in the video: The robot positions itself in front of a station, replaces the module in its back and can then continue working. This is an interesting component for industrial availability – but not yet synonymous with 24/7 operation.

Source video UBTECH Robotics
Source
UBTECH Robotics
Published
Duration
1:05 Min.
Assessment
Alpha Bionic

Transparency: The embedded video comes from the named YouTube channel. Alpha Bionic was not involved in its production and separates visible observations from claims and conclusions. Watch the original on YouTube.

The most important things in brief

  • The battery change is shown as a coherent process at a designated station.
  • Walker S2 uses its arms to remove the module from the back and insert another one.
  • UBTECH calls a dual battery system and an automatic decision between charging and changing.
  • The film does not show any long-term test or statistical data on reliability.

What can be observed in the video

Walker S2 approaches the changing station backwards and aligns its back to the battery cabinet. He grabs the inserted module with both arms, releases it and places it in a free compartment. He then removes another module and reinserts it into the back holder. The station and the robot are clearly coordinated with each other.

The demonstration confirms more than just a concept image: mechanical interface, gripping movement and positioning exist in a functional form. What is particularly relevant is that a humanoid robot carries out the change with its own arms and no external changing mechanism takes over the entire process.

Key scenes

  • approx. 0:08: Walker S2 positions itself backwards in front of the station.
  • approx. 0:17:The robot grabs the battery module in its back.
  • approx. 0:27:The removed module is placed in the station.
  • approx. 0:39: Walker S2 picks up another module.
  • approx. 0:51:The battery is put back into the robot.

Why an autonomous change is industrially interesting

For mobile robots, the battery life limits productive use. An automatic change can shorten downtime and theoretically allows a system to continue working after a few minutes. This is particularly important for humanoid robots because their many joint drives require a comparatively large amount of energy.

The expression “24/7” still describes an operational goal, not an availability measured in the video. Continuous operation requires more than just energy supply: grippers, joints, sensors and computers must work reliably; Errors must be identified and corrected; the station must have loaded modules ready. Charging times and the number of available batteries also determine the actual balance.

Test result: The core principle visibly works

Of the five pilot videos, this demonstration provides the most clearly defined proof of functionality. The task, interface and result are immediately recognizable. The walker removes and replaces a module. This justifies the statement that UBTECH has technically implemented an automated change. There is no operating data for the further assertion of economic efficiency: only the changeover time, error rate, battery wear, station availability and the productive time between two changes combine to produce a reliable value for a factory operator.

What the video doesn’t prove

There is no information about how often the change was tested, what error rate was achieved and how precisely the robot aligns itself when the station position changes slightly. Damaged, hot or incorrectly inserted modules are not shown. It also remains unclear how the area will be secured against people during the change.

The correct finding is: UBTECH shows a technically implemented autonomous battery change. A longer field test would have to prove that Walker S2 can fulfill industrial tasks around the clock without any relevant interruptions. Our article Walker S2 at Rossmann.

deals with the current DACH context

Sources and transparency

The primary source is the official UBTECH video on autonomous battery replacement from July 17, 2025. The terms “world’s first” and “24/7” are manufacturer information. Alpha Bionic does not treat them as independently verified test results.

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Nico Nuss [Image content created with AI]
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Author Nico Nuss has been working on mobile computing and automation software since 2001. Drawing on his experience and strong interest in future technologies, he focuses on robotics and AI.

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