UW Researchers Develop Battery-Free Pacemaker Powered by Heartbeats

For as long as the heart has beaten, it has also carried the burden of its own repair — surgeries, replacements, the quiet accumulation of hardware inside a living body. Researchers at the University of Wisconsin–Madison have now proposed a different covenant: a pacemaker that draws its power not from a battery destined to fail, but from the very contractions it exists to regulate. Published in August 2026, the work by Pengfei Chen and Xudong Wang offers a vision in which a single implant might last a lifetime, sparing patients — especially younger ones — from the repeated surgical interventio