Performance Specifi cations Nominal Voltage ...........................................................................4 volts (2 cells) Nominal Capacity 20-hr. (225mA to 3.5 volts) ............................................................... 4.5 AH 10-hr. (420mA to 3.50 volts) ............................................................. 4.2 AH 5-hr. (765mA to 3.40 volts) ............................................................. 3.8 AH 1-hr. (2.7A to 3.00 volts) ................................................................. 2.7 AH 15-min. (8.5A to 2.70 volts) ...................................................................2.1 AH Approximate Weight ........................................................... 1.30 lbs. (0.59 kg) Energy Density (20-hr. rate) ................................. 1.23 W-h/in3 (75.16 W-h/l) Specifi c Energy (20-hr. rate) ............................. 13.85 W-h/lb (30.53 W-h/kg) Internal Resistance (approx.) ...................................................... 15 milliohms Max Discharge Current (7 Min.) ............................................... 13.5 amperes Max Short-Duration Discharge Current (10 Sec.) .................. 45.0 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 ........................... 3 batteries in series with PSC-12500A