The Liebert GXT4-144VBATKIT is a hot-swappable, lead acid UPS internal battery kit designed for use with the Liebert GXT3-5000RT208, GXT3-6000RT208, GXT4-5000RT208, and GXT4-6000RT208 UPS systems.Battery Characteristics: Spill ProofBattery Chemistry: Valve-regulated Lead Acid (VRLA)Maximum Battery Recharge Time: 3 HourCapacity: 9000 mAhOutput Voltage: 12 V DCHeight: 2.8Width: 8.1"Depth: 19.3"Weight (Approximate): 75.80 lbCompatibility: Emerson Libert UPS:GXT4-5000RT208GXT4-6000RT208"