APC Smart-UPS 450VA Rack Mount 1U (SC450RM1U) Compatible Replacement Battery Pack by UPSBatteryCenter APC Smart-UPS 450VA RM 1U Compatible Replacement Battery Pack - 100% Compatible Compatible with: SC450RM1U (Check the model # on the back of your UPS) Arrives assembled, charged, and ready for use. Plug & Play! 1 Year Replacement Warranty - New, Fresh Stock Manufactured & sold exclusively by UPSBatteryCenter