Tripp Lite's premium UPS replacement battery cartridges breathe new life into UPS systems suffering from expired or weak internal batteries. Each replacement battery cartridge is carefully screened and certified to meet or exceed original specifications and ships ready for installation. Reusable packaging holds expired batteries for recycling center delivery. See Tripp Lite's UPS replacement battery web page to confirm compatibility and quantity required. COMPATIBLE WITH SELECT VERSIONS OF TRIPP LITE MODELS SMART750RMXL2U (LED version only), SMART1000RM2U (LED version only), SMX1000RT2U (LED version only), SU750RTXL2U, SU1000RTXL2Ua AND OTHER MODELS RECOMMENDING THIS REPLACEMENT BATTERY CARTRIDGE.