product information : apc smart-ups sc 420va 230v technical specifications output power capacity - 420 va output power capacity - 260 watts nominal output voltage - 230 volts output connections - 3 x iec 320 c13 (batt backup), 1 x iec 320 c13 (surge) (2) iec jumpers replacement battery cartridge - rbc2 typical backup time at half load - 13.5 minutes (130 watts) typical backup time at full load - 5.5 minutes (260 watts) interface port - db-9 rs-232