Amazon.com: Beiter DC Power APC-UPS Backups RS1500 These Batteries are High Performance, Rechargeable (2)12V9ah Replacement for APC RBC109 : Automotive
APC Back-UPS Pro, 1500VA/865W, Tower, 120V, 10x NEMA 5-15R outlets, AVR, LCD, User Replaceable Battery - BR1500G | APC USA
APC Back-UPS RS RS1500 UPS Battery Set (Replacement)
Amazon.com: APC Back UPS RS 1500 BX1500-PCN Compatible Replacement Battery Pack by UPSBatteryCenter : Electronics