Amazon.com: Replacement for APC Back-UPS 600 BN600 Battery - Replacement UB1290 Universal Sealed Lead Acid Battery (12V, 9Ah, 9000mAh, F1 Terminal, AGM, SLA) - Includes Two F1 to F2 Terminal Adapters :
Odyssey Battery Odyssey 96R Performance Series 12V Battery: 96R Group Size, 600 CCA, 700 CA, 90 RC ODP-AGM96R - Advance Auto Parts
EverStart Plus Lead Acid Automotive Battery, Group Size 75 (12 Volt/600 CCA) - Walmart.com