Compatible Replacement Battery Pack for APC Back-UPS XS 1200VA BX1200 by UPSBatteryCenter New compatible replacement battery pack for APC Back-UPS XS 1200 Compatible UPS model: BX1200 (Check the model # on the back of the UPS) Hot Swappable - No downtime required - Easy Installation - Plug & Play Arrives fully charged and ready to go - (1) Year Replacement Warranty! Manufactured & sold exclusively by UPSBatteryCenter