China unveils world’s first humanoid robot that can change its own batteries

Shenzhen-based company UBTech said it had developed a new humanoid robot that can change its own batteries. A demonstration video released on July 17, 2025 shows the whole process of the Walker S2 robot changing its batteries on its own. This feature means that the robot can – in theory– work non-stop 24 hours a day without human assistance, according to the Chinese company.