BP24V28-2U rack-mount external battery pack offers extended battery runtime when used in conjunction with expandable 24V rack-mount UPS systems. Includes heavy-gauge cabling with high-current DC connector for safe, simple installation. Included mounting accessories support 2U rack-mount installation in 4-post racks. Options for 2-point front-rail mounting, 2-post center-mounting and wall-mount installation available.Compatible with SMART750RMXL2U, SU750RTXL2U, SU1000RTXL2UA, SUINT1000RTXL2UA and other UPS systems that specify the use of this battery pack.