Vibration energy harvesters for biomedical and wearable applications: Scope, recent advances, and commercialization barriers

Recent biomedical and wearable tech advances enable real-time health monitoring, but their adoption is limited by dependence on short life span, bulky batteries that require frequent replacement. This persistent limitation not only hinders device miniaturization and long-term functionality but also poses significant patient burdens, especially for implantable devices requiring invasive replacement surgery. Vibration energy harvesting offers a promising alternative by converting biomechanical energy from body movements into sustainable electrical power. This review comprehensively examines the scope, mechanisms, recent advances and challenges in vibration energy harvesters (VEHs) for biomedical and wearable applications. The four primary transduction mechanisms: piezoelectric, electrostatic, electromagnetic, and triboelectric were analyzed with a focus on their operational principles, material configurations, and biocompatibility considerations, followed by a comparative assessment of their performance, miniaturization potential, and integration challenges. The paper highlights cutting-edge developments from the past five years, including hybrid systems that synergize multiple mechanisms to enhance efficiency and adaptability for low-frequency human motion. The significance of this field lies in its potential to enable a new generation of truly autonomous, self-sustaining medical devices, thereby revolutionizing patient care by eliminating power supply as a constraint. Despite significant progress, critical technical, design, and commercialization barriers persist, such as low power output, narrow operational bandwidth, reliability concerns, and stringent biocompatibility requirements. Further impeding widespread adoption are manufacturing costs, regulatory hurdles, and market competition with conventional batteries. By addressing these challenges with material innovations, advanced modeling, and efficient power management circuits, VEHs can revolutionize self-powered wearables. Future success hinges on interdisciplinary collaboration to bridge lab research and commercial viability for autonomous healthcare integration. This work stands out by synthesizing a critical analysis of both the technological promises and the practical commercialization hurdles, providing a holistic roadmap for researchers and industry stakeholders aiming to make self-powered biomedical devices a clinical reality. • Explores the potential of vibration energy harvesters (VEHs) for sustainable healthcare. • Reviews mechanisms and material advancements with a focus on biocompatibility. • Highlights key breakthroughs in VEHs efficiency, miniaturization, and power output for medical applications. • Identifies critical challenges limiting market adoption and proposes solutions. • Outlines actionable steps to accelerate VEHs integration into real-world healthcare systems.