Amazon.com: Powerstar Replacement for CSB HR1234W F2 Battery for APC UPS Units - 2 Year Warranty : Electronics
CSB HR1234W 12V 9Ah UPS Batteries (10 Pack)
Mighty Max Battery 12V 9AH SLA Replacement Battery for HR-1234W-F2 Rechargeable Sealed Lead Acid 1290 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com