This APC Replacement Battery Cartridge is specifically designed to be fully compatible with APC Back-UPS. The 12V 6.5Ah VRLA battery is thoroughly tested to restore the UPS performance to its original specifications. The APCRBC154 battery comes with a 2-year return or replaceable warranty. To see the compatible UPS list, please click "View Compatible UPS Models"button in "Get Support" Section at APC.com