Paper Title
Skin Charge: A Wearable Device That Generates Power From Body Heat and Sweat

Abstract
Wearable electronics have become increasingly important in healthcare monitoring, fitness tracking, and Internet of Things (IoT) applications. However, the heavy dependence on rechargeable and disposable batteries limits device autonomy and contributes to electronic waste. This paper presents Skin Charge, a hybrid wearable energy harvesting system designed to generate electrical power from human physiological sources, specifically body heat and sweat. The proposed system integrates a thermoelectric generator (TEG) based on the See beck effect and a silver-ion bio electrochemical electrode that extracts energy from sweat. The harvested low-level voltage is boosted using a DC–DC converter, regulated, and stored in a rechargeable lithium battery to ensure stable system operation. A microcontroller-based control unit manages energy flow and drives peripheral components such as an OLED display and a MAX30102 heart rate sensor, demonstrating practical wearable functionality. Comparative performance analysis indicates improved energy availability and reduced charging dependency compared to conventional battery-based wearable systems. The proposed architecture demonstrates the feasibility of hybrid physiological energy harvesting for sustainable and self-powered wearable electronics. Keywords - Wearable Energy Harvesting, Thermoelectric Generator (TEG), Bio electrochemical Cell (BEC), See beck Effect, Sweat-Based Power, Hybrid Energy System, Renewable Energy, IoT Wear ables, Sustainable Electronics