36V DC External UPS Battery Pack rack/tower external battery pack offers extended battery runtime when used in conjunction with compatible Tripp Lite systems. Multi-use form factor supports configuration in stacking, upright tower and rackmount applications using only 2 rack spaces (2U). Includes heavy gauge cabling with high current DC connector for simple installation. Compatible UPS systems - SMART1500RMXL2Ua, SMX1500XLRT2U and other Tripp Lite UPS systems that specify the use of this battery pack.