Mighty Max 12V 8Ah SLA Replacement Battery for APC Back-Ups CS 350 - 2 Pack 29483355193 | eBay
Amazon.com: Replacement for Battery 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 :
MIGHTY MAX BATTERY 12V 8Ah SLA Replacement Battery for APC Back-Ups CS 350 MAX3943507 - The Home Depot