APC UPS, 3000 VA Smart-UPS Sine Wave, Short Depth UPS Battery Backup with Extended Run Option, Tower/4U Rack Convertible, Line-Interactive, 208V (SMX3000HVT) - Newegg.com
APC Smart-UPS X 3000VA Rack/Tower LCD UPS Battery Backup with Network Card (SMX3000LVNC) | Dell USA
Battery kit for APC Smart UPS 1500/2200/3000 replaces APC RBC43