Walker S2

UBTECH's Walker S2 achieved a world first in humanoid robotics: autonomous battery swapping enabling true 24/7 industrial operation. Standing 176 cm tall and weighing 73 kg, the Walker S2 is in mass production as of November 2025 with confirmed orders exceeding 800 million yuan (approximately $112 million USD).

The robot features 52 degrees of freedom with fourth-generation dexterous hands (11 DOF each) providing sub-millimeter precision. A high-power waist servo motor enables 15 kg payload lifting with ±162° rotation for ground-reaching flexibility. Walking speed reaches 2.0 m/s with stable dynamic balance. Computing runs on a split-brain architecture: Intel Core i7-1185G7 for real-time operating system tasks and NVIDIA Jetson AGX Orin (64GB RAM, 275 TOPS) for vision processing, V-SLAM navigation, and AI inference.

The autonomous battery-swap innovation uses dual 48V lithium-ion packs. When one battery nears depletion, typically after two hours walking or four hours standing. Walker S2 autonomously navigates to a charging pod, removes the used battery, and installs a fresh module in under three minutes. Dual-battery dynamic balancing ensures seamless switching to backup power during critical tasks.

Walker S2 runs UBTECH's Co-Agent system and BrainNet 2.0 swarm intelligence, enabling multiple robots (both bipedal and wheeled units) to share environmental data and coordinate movements. Deployed at BYD, Geely Auto, FAW-Volkswagen, Audi FAW, BAIC New Energy, Foxconn, and SF Express, applications include quality inspection (door locks, headlights, fluid levels), assembly operations (trim parts, seat belts, logos), and material handling. At $90,000 per unit for early adopters, Walker S2 transitions UBTECH from research-focused robotics to revenue-generating fleet deployment.