EXTERNAL BATTERY PACK PROVIDES EXTENDED RUNTIME: Offers extended battery runtime when used in conjunction with expandable 36V Tripp Lite rackmount and tower UPS systems. Note: Limit of 1 BP36V15-2U per UPS, see BP36V42-3U or BP36V27-2US for multi-pack compatibility. UPS COMPATIBILITY: This Extended Battery Pack Module is compatible with: SMART1000RMXL2U, SMART1200XLHG, SMART1500RMXL2Ua, SMART1500XL, SMX1200XLHG, SMX1500XLRT2U and other Tripp Lite UPS systems that specify the use of this battery pack. EASE OF USE: Package includes heavy-gauge cabling with high-current DC connectors for safe, simple installation. RACKMOUNT OR TOWER INSTALLATION: Included mounting accessories support 2U rackmount installation in 4 post racks. Also compatible with 2-9USTAND for upright tower configuration, 2POSTRMKITWM for 2-post racks or wall installation and UPDHDEARKIT for 2-point front-rail rack installation without rear supports (all accessories sold separately). RELIABLE PRODUCT FULLY BACKED AND SUPPORTED: This product is covered by a 2-Year Limited Manufacturer's Warranty and is supported by Eaton's expert technical support team over phone, web and email.