Keep protected loads online when utility power drops. Vertiv PSI Lithium PWR Protect EBC 38V YRS1-2 is an external battery cartridge designed for compatible PSI power protection systems, giving infrastructure teams a purpose-built replacement path for maintaining UPS runtime. Its 38 V battery architecture supports the electrical profile required by the platform, helping preserve backup power availability without forcing a full system replacement. For environments where uptime is measured in minutes, not hours, battery condition matters as much as UPS capacity. This cartridge is intended for organizations that want a direct-fit battery solution aligned to the original system design, rather than a generic substitute. That matters when you are protecting network closets, edge compute, or distributed IT equipment that cannot tolerate inconsistent battery behavior. Use it to restore runtime capability, keep maintenance cycles predictable, and extend the service life of the UPS investment. As with all replacement battery components, confirm compatibility against the exact Vertiv platform and cartridge requirement before ordering.