Features: Hot Swap Batteries Rack/Tower Convertible User-replaceable batteries Technical Specifications Battery type VRLA Battery mounting Enclosed battery cartridge Battery manufacturer -- Expected Battery Life (years) 3 - 5 Pre-Installed Batteries 2 RBC™ Quantity 2 Net weight 131 lbs. ( 60 kg ) Maximum height 3.40 inches ( 8.64 cm ) Maximum width 17 inches ( 43 cm ) Maximum depth 26.70 inches ( 67.82 cm ) Shipping Weight 152 lbs. ( 69 kg ) Shipping Width 23.46 inches ( 59.59 cm ) Shipping Height 9.84 inches ( 24.99 cm ) Shipping Depth 38.58 inches ( 97.99 cm ) Color Black Units per Pallet 8 Operating Environment 0 - 40 °C ( 32 - 104 °F ) Operating Relative Humidity 0 - 95 % Operating Elevation 0-10000 feet ( 0-3000 meters ) Storage Temperature -5 - 45 °C ( 23 - 113 °F ) Storage Relative Humidity 0 - 95 % Storage Elevation 0-30000 feet ( 0-9000 meters ) Standard warranty 2 years repair or replace