China’s UBTech has developed the Walker S2, the first humanoid robot in the world that can autonomously change its battery, thus being able to work 24/7. The Walker S2 is specifically built to work in industrial settings, and it can change its power pack in three minutes without the help of a human being.
Walker S2 is designed to be enduring and autonomous with the use of advanced bipedal locomotion and a hot-swappable dual-battery system. A new video has been released, which depicts the robot in action: the smooth-looking humanoid robot removes a spent battery and replaces it with a new one before going back to work, emphasizing the precision and independence that characterize this new generation machine.
According to UBTech, the dual-battery system enables Walker S2 to use a backup battery during the task in case of failure to maintain continuous operation. The robot may even make a decision on whether to recharge or swap depending on the urgency of the task; hence, energy management is dynamic and intelligent.
In May 2025, UBTech collaborated with Huawei Technologies to increase the use of humanoid robots in Chinese factories and households. The core of this drive is the so-called BrainNet cloud-device system that coordinates the work of several humanoids. As shown at Zeekr’s 5G-enabled smart factory, dozens of previously separate Walker S1 models now work in real-time with AI-powered scheduling, shared maps, and vision-based navigation.
BrainNet has a global decision-making brain and a local control brain supported by Transformer models and DeepSeek-R1 reasoning. This allows a group of robots to work in a coordinated manner, such as inspection, assembly, and logistics, with great efficiency.
UBTech is celebrating this as a transition to Practical Training 2.0 and a future in which humanoid robots cease to be lonely aides and become independent, intelligent collaborators operating in tandem to transform modern manufacturing.