IRON: Xpeng's humanoid robot uses solid-state battery for long life

At the 2025 AI Day in Guangzhou, Chinese company Xpeng unveiled the second-generation IRON humanoid robot, featuring significant upgrades in movement, control, and balance to mimic human behavior in dynamic environments. Standing 5 feet 10 inches tall and weighing 154 pounds, IRON combines advanced software with flexible mechanics, including 62 active joints and synthetic muscles modeled after the human spine, enabling fluid, natural motions such as walking, twisting, and balancing on uneven surfaces. Its curved head display forms an expressive face, while a lightweight all-solid-state battery provides long-lasting, safe energy without overheating. Powered by three Turing AI chips capable of 2,250 trillion operations per second, IRON integrates Xpeng’s Vision-Language-Action (VLA) system to instantly analyze visual and auditory inputs and respond appropriately. This allows the robot to perform tasks like answering questions, folding laundry, and guiding visitors. Its walking ability, trained on thousands of hours of human gait data, enables it