APC SmartUPS 3000VA Extended Length Runtime Convertible Tower/Rack UPS Refurbished (SUA3000XL-US) US Only - BatteryUPSForLess
RBC 27 Battery Replacement for APC SmartUPS3000 Rack Mount XL - YouTube
APC UPS battery replacement for Smart-UPS 1500 (SUA1500) and XL 3000 (SUA3000XLT): batteries RBC7 and RBC55 « The Wiert Corner – irregular stream of stuff