ReJoule is developing a BMS - battery management system - capable of assessing accurately and qiuckly the health of a battery and, through active balancing, to add 10-15% usable capacity while also being more scalable than most other electrochemical impedance spectroscopy (EIS) systems. By tracking extensive data about the internal electrochemistry of the cell, ReJoule is bringing advanced tools to BMS setting a new standard in battery health management: providing invaluable insights: driving improvements in costs, algorithms, and new battery development. Relevant to optimization of any large format battery, from EVs to utility battery storage, the firm's technology can have impact on second-life batteries (2LB), or repurposed EV battery packs. 2LB applications, include energy storage for emergency response, microgrids, and EV charging.