APC UPS Replacement Battery Cartridge #117 - 120 V DC - Sealed Lead Acid (SLA) - Spill-proof/Maintenance-free - Hot Swappable - 3 Year Minimum Battery Life - 5 Year Maximum Battery Life APCRBC117 012302916927
Amazon.com: APC UPS Battery Replacement, RBC48, for APC Smart-UPS SMT750, SMT750US, SUA750 and select others : Electronics