Extend battery coverage for a compatible Vertiv GXT UPS installation using a 72 V battery configuration. This Power Protection extended battery coverage option applies for years 1 through 4, providing a defined coverage period for the battery system associated with the protected-power deployment. It is intended for GXT installations where the battery configuration, rather than only the UPS electronics, requires continuing coverage. ZGXT-PB-72V-04 corresponds to the 72 V version of the GXT extended battery coverage offering. The voltage designation matters because battery coverage must match the installed battery-system configuration. Use this option where the protected equipment relies on a GXT UPS configured around a 72 V battery arrangement and coverage is required across the stated first four years. This item is a coverage option, not a UPS or an external battery cabinet. It fits alongside the compatible GXT power-protection system and addresses the battery portion of that installation. Its distinguishing details are the 72 V battery designation and the years 1 through 4 coverage period, making it appropriate where those two requirements match the installed GXT battery configuration.