APC Back-UPS 1500 RS1500 XS1500 12V 7Ah UPS Battery - This is an AJC Brand Replacement This is an AJC Brand&#174; Replacement for a APC Back-UPS 1500 RS1500 XS1500 12V 7Ah UPS Battery Voltage: 12V (12 Volts) Capacity: 7Ah Terminals: F2 Number of Batteries Required for a Full Replacement: 2