A Breeze‐Driven TENG System Enabling Full‐Cycle Charging of Batteries for Distributed Sensors

Harvesting breeze wind (3–5 m/s) energy remains a key challenge for sustainably powering distributed sensor networks. Although triboelectric nanogenerators (TENGs) operate efficiently at low frequencies, their inherently low (RMS) current limits practical energy storage integration. Here, we report a breeze‐driven TENG system coupled with a universal power management strategy that enables, for the first time, full‐cycle charging of lithium‐ion batteries from low‐speed wind. Through structural and electrical optimization followed by dedicated power management, the system achieves a 17.9‐fold enhancement in RMS current density, reaching 64.67 ± 4.6 mA·m −2 ·(m·s −1 ) −1 under a breeze wind of 3 m/s. This output supports efficient full charging of 30 mAh and 50 mAh lithium‐ion batteries within 6.26 ± 0.19 and 10.37 ± 0.17 h, respectively. We further demonstrate the system's capability by continuously powering a wireless soil defect (landslides and collapses) and environmental monitoring node over a 0.7 km range. Our work provides a scalable and maintenance‐free platform for distributed sensing using gentle wind energy.