UPS backup battery replacement breathes new life into a Tripp Lite 3-phase UPS system suffering from expired or weak internal batteries. UPS Replacement Battery Cartridge for Tripp Lite SUT20K, SUT30K, SUT40K and SUT60K UPS Systems This UPS backup battery replacement is carefully screened and certified to meet or exceed original specifications. The leakproof, no-maintenance RBCSUT comes pre-assembled and pre-wired as four 12V 9Ah batteries for quick and easy installation in your SUT20K, SUT30K, SUT40K or SUT60K 3-phase UPS (12 RBCSUT cartridges for SUT20K, 18 for SUT30K/SUT40K and 24 for SUT60K). It functions within a wide range of operating temperatures. A sensor automatically informs the UPS that the battery has been replaced, so the UPS can reset the battery age. System Requirements Compatible with Tripp Lite SUT20K, SUT30K, SUT40K and SUT60K UPS systems.