Compatible with the APC Backup XS1500 APC UPS Battery Replacement, APCRBC123, for APC UPS Models BR1000G, BX1350M, BN1350G, BX1000G, BX1300G, SMT750RM2U, SMT750RM2UC, SMT750RM2UNC, SMT750RMI2U, SMT750RMI2UC, SMT750RMI2UNC High Performance Rechargeable Replacement Battery Set (2) 12V 9ah Includes Beiter DC Power