Eaton Tripp Lite Series 48V Extended Battery Module (EBM) for SmartOnline UPS Systems, 2U Rack/Tower - UPS battery -

The valve-regulated lead-acid (VRLA) BP48RT offers extended battery runtime when used in conjunction with SU1500RTXLCD2U, SU1500RTXLCDN, SUINT1000LCD2U and SUINT1500LCD2U SmartOnline UPS systems. It can also be daisy-chained for a maximum of four matching battery packs to deliver even longer extended-run operation. Heavy-gauge cabling with high-current DC connectors is included for safe, simple installation.

You can mount the BP48RT in 2U of space in an EIA-standard 19-inch rack using the included 4-post rail kit or an optional 2-post rail kit (RK2PC, sold separately). You can also adapt it for tower installation using the UPS system's support stands.