Replacement UPS Battery Set for Smart-UPS 3000 (DLA3000RMi2U) APC Dell - (8 batteries - 12V 5.5AH)
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