The Vertiv Liebert External 9000mAh 12V DC UPS battery cabinet offers easy access to battery terminals for maintenance purposes. Compatible with Liebert Liebert GXT5-5000IRT5UXLE , Liebert GXT5-6000IRT5UXLE, Liebert GXT5-8000IRT5UXLE, and Liebert GXT5-10KIRT5UXLE UPS systems. It has Auto detection connectivity ensures proper set-up and configuration of available run time. Rail kit Bundled