APC Smart-UPS XL 750, SUA750XLI 12V 18Ah UPS Battery - This is an AJC Brand Replacement This is an AJC Brand&#174; Replacement for a APC Smart-UPS XL 750 12V 18Ah UPS Battery Voltage: 12V (12 Volts) Capacity: 18Ah Terminals: NB Number of Batteries Required for a Full Replacement 2