TRIPP LITE 2U UPS Replacement 48VDC Battery Cartridge (2 sets of 4) for select Tripp Lite UPS systems.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 into your UPS system. Reusable packaging holds expired batteries for recycling center delivery. See Tripp Lite's UPS replacement battery web page to confirm compatibility and quantity required.