TRIPP LITE's BP36V27-2US S rack / tower external battery pack offers extended battery runtime when used in conjunction with expandable 36 V Tripp Lite's rackmount or tower UPS systems. Includes heavy gauge cabling with high current DC connector for safe, simple installation. Included daisychain connector enables the connection of additional compatible 36 V external battery packs to the host UPS. Included mounting accessories support 2U rackmount installation in 4 post racks.