Apc - Schneider Prem RBC7, Absorbent Glass Mat (AGM), Maintenance-Free Design with Spill Proof Construction, Compatible with Select APC RBC7 UPS Units, Lead-Acid. The brand new replacement battery set for your APC RBC7 includes 2 batteries - SP12-18HR (12 Volts 18 AH). You must use the existing cables and hardware to connect your UPS batteries.