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 :
APC Back-UPS CS 350VA, 230V, 4 IEC outlets (1 surge) - BK350EI | APC Hong Kong (English)
Amazon.com: 12V 8Ah APC Back-UPS CS 350, BK350, BK350i, BK350Ei UPS Replacement Battery - 2 Pack Beiter DC Power : Health & Household