Electricity demand is rising rapidly across the U.S., driven by the expansion of energy-intensive facilities such as battery plants and data centers. While demand-side programs offer a flexible solution to manage peak loads, many communities are often left out due to high costs and limited access to existing energy storage systems that support participation in demand-response initiatives and reduce grid dependence during power disruptions. Our goal is to strengthen U.S. energy resilience by developing an affordable, general-purpose alternative to existing storage systems. By repurposing retired electric vehicle (EV) batteries, we aim to build community-driven, sustainable energy storage systems that provide backup power and demand flexibility where needed. Our Battery-Second-Use Community Energy Storage (B2U-CES) model is unique in that it: (1) leverages community-donated EV batteries as a circular resource, fostering a sense of ownership and shared responsibility in supporting essential community facilities; and (2) engages local stakeholders in co-designing pilot systems that combine virtual testing with real-world deployment. This project will deliver broad societal, economic, and environmental benefits by improving energy resilience, reducing battery waste, and promoting circular energy practices. Through cross-sector collaboration and engagement with community partners, this research will develop a comprehensive, community-driven energy resilience solution that addre