Apc - Schneider Prem RBC27, Batteries (UPS battery replacements), Battery capacity of 864 VAh, High Quality UPS Batteries, High Rate Discharge Design, Includes All required connectors, Battery recycling guide, Installation guide, Metallic battery tray or enclosure, Reusable packaging. The brand new replacement battery set for your APC RBC27 includes 8 batteries - SP12-9HR (12 Volts 9 AH). You must use the existing cables and hardware to connect your UPS batteries.