APC Smart-UPS SMARTCELL-XR UXBP48M UPS The APC Smart-UPS SMARTCELL-XR UXBP48M UPS Battery requires 4 batteries to replace it. The price above includes all 4 of them.The APC Smart-UPS SMARTCELL-XR UXBP48M UPS Battery cross-references to the below.Double check the actual size of the batteries being replaced. UPS replacement battery packs contain replacement batteries only. You must reuse your existing cabling and hardware. APC model numbers are very similar, so check the model number listed here with the barcode label on the. . . The state-of-the-art lead-acid battery is the valve-regulated type (sometimes called "sealed" or maintenance-free), which fixes the acid electrolyte in a gel or in an absorptive fiberglass mat. The advantage of this design is that the battery needs no water additions, can be operated in any position, and can be used in close proximity to people and sensitive equipment. Additional benefits: maintenance-free,sealed no-leak design, higher cranking amps, lower self-discharge, greater vibration resistance, heavy duty, no-corrosion terminals. 53.1 12 75 433 10.19 6.63 8.69 1 Year SLA Universal Power Group Yes http://site.apexbattery.com/logos/apc.jpg 806593458224 New B2 U