. Genuine APC RBC (TM) are tested & certified for compatibility to restore UPS performance to the original specifications Key Product Info. Ensures clean uninterrupted power to protected equipment while batteries are being replaced Ensures clean uninterrupted power to the loads when adding extra runtime to the UPS Product Features Hot-swappable batteries Ensures clean uninterrupted power to protected equipment while batteries are being replaced Plug-&-Play external batteries Ensures clean uninterrupted power to the loads when adding extra runtime to the UPS.