The Vertiv Liebert GXT5LI-48VBATKIT2 is an internal replacement battery kit designed for Vertiv Liebert GXT5 1500 to 3000VA Lithium-Ion Online UPS - GXT5LI-1500LVRT2UXL, GXT5LI-2000LVRT2UXL, GXT5LI-3000LVRT2UXL . This online UPS offers the 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 (the lowest 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 the user when the internal batteries need to be replaced.