The Vertiv Liebert GXT5LI-48VBATKIT1 is an internal replacement battery kit designed for Vertiv Liebert GXT5 1000VA Lithium-Ion Online UPS (GXT5LI-1000IRT2UXL). This online UPS offers highest level of power conditioning and battery backup in server rooms, network closets, and other edge or distributed IT locations. Lithium-Ion batteries require fewer battery replacements and last up to 3x as long as traditional VRLA batteries reducing maintenance, labor, and replacement costs (lower TCO). It comes with a five-year advanced replacement warranty. This Liebert GXT5 UPS includes an automatic and manual self-diagnostic test feature, which informs the condition of the batteries within the UPS and notifies user when the internal batteries need to be replaced.