This project by ALTEN Technology describes the enhancement of an existing wearable ECG data recorder for real-time cardiac analysis and extended monitoring. Through detailed analysis, testing, and firmware optimization, ALTEN Technology successfully reduced the device’s energy consumption while maintaining algorithm performance. The outcome was a low-power, long-term electrocardiogram recording and analysis system that exceeded lifetime requirements, achieved FDA 510(k) clearance, and dramatically improved battery life from 24 hours to a full seven days, all while meeting the ANSI/AAMI EC57 standard.