Extend UPS availability where runtime matters most. The Vertiv PSI PWR PROTECT EBC 48V YRS1-3 is a replacement external battery cartridge designed for compatible PSI Power Protect systems in the YRS1-3 range. It gives infrastructure teams a direct path to restore backup capacity after battery wear, helping maintain continuity for servers, network gear, and edge equipment that cannot tolerate unexpected shutdowns. This cartridge is intended for environments that value predictable service life and controlled maintenance windows. Instead of replacing an entire UPS, teams can refresh the battery subsystem and keep the installed power platform in service. That approach reduces disruption, preserves the original system fit, and supports more disciplined lifecycle planning. For procurement teams, the value is straightforward: targeted replacement, not full-system replacement. For operations teams, it means a faster return to protected runtime and less exposure to aging battery performance. Use it to keep critical loads covered while aligning replacement timing with maintenance schedules and site standards.