Amazon.com: New Battery Pack for APC Smart UPS X 750 Tower/Rack 120V SMX750-NMC Compatible Replacement by UPSBatteryCenter : Electronics
Amazon.com: APC UPS Battery Replacement, RBC48, for APC Smart-UPS SMT750, SMT750US, SUA750 and select others : Electronics
Battery kit for APC Smart UPS 750 replaces APC RBC48
Battery kit for APC Smart UPS X 750/1000 replaces APCRBC116
APC Smart-UPS 750 Rack Mount 1U (EMC750R1) - Brand New Compatible Replacement Battery Kit | RefurbUPS
Battery kit for APC Smart UPS 700 replaces APC RBC9
Mighty Max 12V 7Ah SLA Battery Replacement for APC Smart-UPS 750 UB1270 - 8 Pack | eBay
APC SMART-UPS 750 SUA750I Battery Replacement - UB1280 Universal Sealed Lead Acid Battery (12V, 8Ah, 8000mAh, F1 Terminal, AGM, SLA) - Includes TWO F1 to F2 Terminal Adapters - Walmart.com