Tripp Lite Replacement Battery Cartridge 51 (RBC51) - 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 manufacturer specifications and ships ready for installation into your UPS system. Reusable packaging holds expired batteries for recycling center delivery. Compatible with a wide variety UPS brands and models. See Tripp Lite's UPS replacement battery web page to confirm compatibility and quantity required. Includes 18 month warranty. Restores UPS runtime performance to its original runtime specifications Reusable packaging contains expired batteries for recycling center delivery Compatible with a variety of UPS brands Includes 18 month warranty Applications Extends the operating life of older UPS systems Restores or enhances runtimes of all UPS systems exhibiting reduced power failure runtime Package Includes 12 volt UPS replacement battery cartridge Instruction manual with installation, recycling and warranty information