Worked on improving energy estimation accuracy for embedded systems by addressing a key bug in the bq274xx energy gauge calculation within the zephyr-testing repository. The solution involved replacing a hardcoded 3.7V value with a dynamic design voltage parameter sourced directly from the device tree, ensuring calculations adapt to different hardware variants. This approach enhanced the reliability of energy readings across multiple platforms. The work was implemented using C programming, leveraging embedded systems expertise and hardware interfacing skills. The fix was delivered as a clear, traceable commit, reflecting a focused and methodical approach to problem-solving within a collaborative development environment.