Eaton PowerWare 5110-500 VA 12V 5Ah UPS Replacement Battery: BatteryClerk.com
Amazon.com: 2 Pack Replacement for Eaton/POWERWARE 5110-1500 Battery - Replacement UB1290 Universal Sealed Lead Acid Battery (12V, 9Ah, 9000mAh, F1 Terminal, AGM, SLA) - Includes 4 F1 to F2 Terminal Adapters : Health & Household
Amazon.com: Eaton-Powerware 5110 1000 Compatible Replacement Battery Set : Health & Household