Performance Specifi cations Nominal Voltage ...........................................................................6 volts (3 cells) Nominal Capacity 20-hr. (325mA to 5.25 volts) .......................................................... 6.50 AH 10-hr. (610mA to 5.25 volts) ........................................................... 6.10 AH 5-hr. (1.1A to 5.10 volts) ............................................................... 5.50 AH 1-hr. (4.03A to 4.50 volts) ............................................................ 4.03 AH 15-min. (12.7A to 4.50 volts) ...............................................................3.18 AH Approximate Weight ........................................................... 2.70 lbs. (1.22 kg) Energy Density (20-hr. rate) ................................. 1.21 W-h/in3 (74.14 W-h/l) Specifi c Energy (20-hr. rate) .............................. 14.44 W-h/lb (31.84 W-h/kg) Internal Resistance (approx.) ...................................................... 12 milliohms Max Discharge Current (7 Min.) ............................................... 19.5 amperes Max Short-Duration Discharge Current (10 Sec.) .................. 65.0 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-61000A, 61000A-C