China Innovation: Scientists Create Self-Charging Micro-Pacemaker the Size of a Capsule
Source: Xinhua
Source: Xinhua
Beijing, Jan. 26 — Chinese scientists have engineered a tiny, battery-free cardiac pacemaker that powers itself, marking a major leap forward for implantable medical technology.
After nearly seven years of joint development by the University of Chinese Academy of Sciences, Tsinghua University, Peking University, and multiple hospitals, the research was recently featured in Nature Biomedical Engineering.
According to lead author Ouyang Han, an associate professor at the University of Chinese Academy of Sciences, this breakthrough could make pacemakers last as long as the heart itself—eliminating the need for repeated surgical replacements and moving closer to maintenance-free, human-integrated implants.
Pacemakers are essential for restoring normal heartbeat patterns, and similar bioelectronic devices help restore movement, vision, and hearing, while also aiding pain control and disease detection. These technologies provide vital support for early treatment and long-term care.
The main drawback has always been battery life: when power runs out, patients face another risky and expensive operation. A self-sustaining energy source has long been the field’s biggest obstacle.
This new capsule-sized device solves that with a built-in energy harvester that converts the heart’s natural motion into electricity using electromagnetic induction. Lab tests confirm its power output surpasses the minimum needed for lifelong operation, ensuring reliable rhythm control.
The design is ultra-compact, biocompatible, and blood-safe, allowing minimally invasive implantation via catheter and reducing surgical impact. The team also created a streamlined magnetic levitation system that cuts energy waste and friction, enabling near-zero startup resistance and highly efficient, stable power generation.
In month-long animal studies, the pacemaker ran continuously and kept heart rhythm steady, showing strong potential for human use.