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However, conventional stimulators rely on wired connections or implanted batteries, severely limiting implantability, biosafety, and clinical translation. Recent wireless, battery\u2010free piezoelectric systems, primarily based on ultrasound or pressure\u2010driven transduction, remain constrained by auxiliary equipment, working distance, and external control. Here, we report a fully wireless, circuit\u2010free neural stimulator built on a millimetric magneto\u2010mechano\u2010electric (MME) cantilever transducer (3 \u00d7 10 \u00d7 5\u00a0mm) with a barium titanate (BTO) piezoelectric ceramic core. Under low\u2010frequency alternating magnetic fields, the MME cantilever mechanically oscillates, inducing stress on the BTO element and thereby converting magnetic energy into therapeutic electrical pulses. The use of BTO minimizes potential biosafety risks. Moreover, the device operates stably at 16\u00a0cm from the magnetic source, outperforming most existing wireless stimulators. In vitro, MME\u2010mediated stimulation doubles PC12 neurite outgrowth and neuronal differentiation. In a rat sciatic nerve injury model, the implanted stimulator exhibits excellent biosafety and significantly enhances nerve regeneration and motor recovery, achieving a \u223c1.5\u2010fold improvement in the sciatic functional index.<\/jats:p>","DOI":"10.1002\/advs.75833","type":"journal-article","created":{"date-parts":[[2026,5,25]],"date-time":"2026-05-25T14:43:53Z","timestamp":1779720233000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Millimeter\u2010Scale Implantable Magneto\u2013Mechano\u2013Electric Transducer Based on BTO Piezoelectric Ceramics for Remote Wireless Electrical Stimulation of Injured Sciatic Nerves"],"prefix":"10.1002","volume":"13","author":[{"given":"Yijing","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory For Manufacturing Systems Engineering Center for Mitochondrial Biology and Medicine School of Life Science and Technology International Joint Laboratory for Micro\/Nano Manufacturing and Measurement Technology Key Laboratory of Biomedical Information Engineering of Ministry of Education Xi'an Key Laboratory For Biomedical Testing and High\u2010end Equipment Xi'an Jiaotong University  Xi'an Shaanxi China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingyu","family":"Tian","sequence":"additional","affiliation":[{"name":"State Key Laboratory For Manufacturing Systems Engineering Center for Mitochondrial Biology and Medicine School of Life Science and Technology International Joint Laboratory for Micro\/Nano Manufacturing and Measurement Technology Key Laboratory of Biomedical Information Engineering of Ministry of Education Xi'an Key Laboratory For Biomedical Testing and High\u2010end Equipment Xi'an Jiaotong University  Xi'an Shaanxi China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhe","family":"Xu","sequence":"additional","affiliation":[{"name":"State Key Laboratory For Manufacturing Systems 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