Keep GXT4 UPS protection in service with the Vertiv Liebert GXT4 48V battery kit. This internal, hot-swappable replacement battery is designed for 1.5-2 kVA Liebert GXT4 systems, giving infrastructure teams a direct path to refresh aging batteries without taking the UPS out of service. The 48 V, 9 Ah lead-acid design is a practical fit for environments where uptime matters and maintenance windows are tight. By replacing the battery assembly rather than the full UPS, you preserve the installed power platform while restoring the runtime your equipment depends on during short outages and transfer events. This kit is well suited to branch offices, network closets, and small server rooms that rely on compact UPS protection. Its spill-proof construction and hot-swap capability support safer service workflows and reduce the operational friction that comes with battery end-of-life. When the UPS chassis is still right for the job, this replacement kit keeps the investment productive and the protected load covered.