APC Back-UPS XS XS1500 (BX1500G) 12V 8Ah UPS Battery - This is an AJC Brand Replacement This is an AJC Brand&#174; Replacement for a APC XS1500 (BX1500G) 12V 8Ah UPS Battery Voltage: 12V (12 Volts) Capacity: 8Ah Terminals: F2 Number of Batteries Required for a Full Replacement: 2