Amazon.com: APC UPS Battery Replacement, RBC18, for APC Smart-UPS Models SC250RM1U, SC450RM1U and select others, Black : Electronics
RBC7 Battery Replacement for APC SmartUPS 1000 XL - YouTube
Amazon.com: UPC UPGRADE PARTS COMPANY RBC7-UPC Replacement Battery for APC Smart-UPS SU1400, SUA1500, SUA750XL, SUA1000XL, SU1400NET, SU1000XLNET - Scroll Down for The Complete List of Compatible Models : Electronics