Replacement Backup Battery Cartridge for APC RBC43 Note: SUM48RMXLBP2U requires two (2) battery packs OEM Part Numbers: RBC43, RBC-43 APC: DLA2200RM2U, DLA2200RMI2U, DLA3000RM2U, DLA3000RMI2U, DLA3000RMT2U, SmartUPS RM SUA3000R2X145, SmartUPS RM SUA3000R2X180, SmartUPS RM SUA3000RM2U, SmartUPS RM SUA3000RMT2U, SUA2200RMI2U, SUA2200RMUS, SUA3000RM2U, SUA3000RMI2U, SUA3000RMT2U, SUA3000RMUS, SUM1500RMXL2U, SUM1500RMXLi2U, SUM3000RMXL2U, SUM3000RMXLi2U, SUM48RMXLBP2U, RBC43