Tripp Lite's premium UPS replacement battery cartridges breathe new life into UPS systems suffering from expired or weak internal batteries. Each replacement battery set is carefully configured to meet or exceed all of the original manufacturer specifications and ships pre-assembled and ready for installation into your UPS system. Reusable packaging holds expired batteries for recycling center delivery. Compatible with select UPS systems from APC and other major brands - see Tripp Lite's UPS replacement battery page to confirm compatibility and quantity required. Includes an 18-month warranty.