Performance Specifi cations Nominal Voltage ........................................................................ 12 volts (6 cells) Nominal Capacity 20-hr. (450mA to 10.50 volts) ....................................................... 9.00 AH 10-hr. (810mA to 10.50 volts) ......................................................... 8.10 AH 5-hr. (1.44A to 10.20 volts) ........................................................... 7.20 AH 1-hr. (5.4A to 9.00 volts) .............................................................. 5.40 AH 15-min. (14.4A to 9.00 volts) .............................................................. 3.60 AH Approximate Weight ........................................................... 6.00 lbs. (2.72 kg) Energy Density (20-hr. rate) .............................. 1.92 W-h/in3 (116.94 W-h/l) Specifi c Energy (20-hr. rate) ............................. 18.00 W-h/lb (39.68 W-h/kg) Internal Resistance (approx.) ...................................................... 13 milliohms Max Discharge Current (7 Min.) ................................................ 27.0 amperes Max Short-Duration Discharge Current (10 Sec.) .................. 90.0 amperes Shelf Life (% of nominal capacity at 68°F (20°C)) 1 Month ...................................................................................................... 97% 3 Months ..................................................................................................... 91% 6 Months .................................................................................................... 83% Operating Temperature Range Charge .. ........................................................... -4°F (-20°C) to 122°F (50°C) Discharge ....................................................... -40°F (-40°C) to 140°F (60°C) Case ...................................................................................................... ABS Plastic Power-Sonic Chargers ................................................ PSC-12800A, 12800A-C