MIGHTY MAX BATTERY 12V 8Ah SLA Replacement Battery for APC Back-Ups CS 350 MAX3943507 - The Home Depot
Amazon.com: Replacement Battery for BACK-UPS CS 350 BK350 - UB1290 Universal Sealed Lead Acid Battery (12V, 9Ah, 9000mAh, F1 Terminal, AGM, SLA) - Includes TWO F1 to F2 Terminal Adapters - CP1500AVRLCD :