This document includes questions and answers that pertain to the ARPA-E Funding Opportunity Announcement (FOA) entitled "Catalyzing Innovative Research for Circular Use of Long-lived Advanced Rechargeables SBIR/STTR (CIRCULAR SBIR/STTR)". The full solicitation on the CIRCULAR SBIR/STTR FOA and additional information can be found on the ARPA-E Funding Opportunity Exchange website (https://arpa-e-foa.energy.gov).