Reusable packaging holds expired batteries for recycling center delivery. See Tripp Lite's UPS replacement battery web page to confirm compatibility and quantity required. 18-month warranty. Compatible with Tripp Lite UPS Models SMART750SLT, SMX750SLT, SMART1050SLT, SMX1050SLT (versions with pre-assembled 2-battery cartridges only; see compatibility listing for non-assembled battery versions) Comes pre-assembled and ready for installation Reusable packaging holds expired batteries for recycling center delivery 18-month warranty Package Includes One pre-assembled battery pack consisting of two 12V batteries