Battery kit for APC Smart UPS SC 1000 and APC Back UPS RS 1500 replaces APC
EXTERNAL BATTERY PK F/ BACK UPS RS/XS 1500VA | Dell USA
Amazon.com: Beiter DC Power APC-UPS Backups RS1500 These Batteries are High Performance, Rechargeable (2)12V9ah Replacement for APC RBC109 : Automotive
American Battery Replacement Battery Cartridge RBC33 for APC (RBC33)