APC S15, S15BLK, S20BLK 12V 9Ah UPS Battery - This is an AJC Brand Replacement This is an AJC Brand&#174; Replacement for a APC S15 12V 9Ah UPS Battery Voltage: 12V (12 Volts) Capacity: 9Ah Terminals: F2 Number of Batteries Required for a Full Replacement 4