Apc - Schneider Prem RBC9, Easy Hot-Swap Installation, Convenient, Easy, and Green, Lead acid, Spill-proof, Black, Replacement Battery Cartridge, UPS battery. The RBC9 Replacement Battery Cartridge #9 from APC is tested and certified for compatibility to restore UPS performance to the original specifications. It is designed by APC by Schneider Electric for APC UPS's.