Tripp Lite RBC52 Replacement Battery Cartridge for Select Tripp Lite and Other Major UPS Brand Restores UPS (uninterruptible power supply) runtime performance to its original runtime specifications Comes pre-assembled and ready for installation into your UPS system; compatible with a variety of UPS brands Reusable packaging holds expired batteries for recycling center delivery Extends the operating life of older UPS systems This item is not for sale in Catalina Island