Restore battery-backed operation in an APC Smart-UPS SMC30 system by replacing its designated RBC/SLA assembly with this eight-cell sealed lead-acid cartridge. Battery Technology APCRBC151-TAA carries a 12 V, 5 A electrical specification. Its sealed lead-acid construction and assembled eight-cell format identify it as a complete replacement battery cartridge rather than a loose-cell battery purchase. Match the cartridge to the UPS model before scheduling replacement. Stated compatibility with APC Smart-UPS SMC30 systems is the primary deployment requirement for this battery. The replacement assembly must match the installed UPS battery compartment, electrical connection, charging system, and battery-management requirements. Selecting the specified RBC/SLA cartridge helps maintain the intended backup-battery configuration instead of substituting individual cells with an unknown assembly. APCRBC151-TAA is an ordering-code form of APCRBC151, not a separate battery model. That relationship distinguishes the ordering designation while preserving the same stated 12 V, 5 A, eight-cell sealed lead-acid configuration. The pack is intended to replace the battery assembly as a unit, with all eight cells specified together for the named Smart-UPS platform. It supports maintenance work where the installed UPS calls for a complete RBC/SLA replacement battery.