Nominal Voltage: 12 volts (6 cells in series)

Nominal Capacity:
20 hour rate (2.0A to 10.50 volts) .............40.0 A.H.
10 hour rate (3.80A to 10.50 volts) .............38.0 A.H.
5 hour rate (6.70A to 10.20 volts).............33.5 A.H.
1 hour rate (24.0A to 9.00 volts) .............24.0 A.H.
15 min rate (74.1A to 9.00 volts) .............18.5 A.H

Approximate Weight: 30.5 pounds (13.8 kg)

Energy Density (20 hour rate): 1.41 Watt-hours/cubic inch (86.3 Watt-hours/l)

Specific Energy (20 hour rate) : 15.7 Watt-hours/pound (34.78 Watt-hours/kg)

Internal Resistance (Fully Charged Battery): 6 milliohms (approximately)

Maximum Discharge Current ( ≤ 7 Min.): 120 amperes

Maximum Short-Duration Discharge Current ( ≤ 10 Sec.): 400 amperes

Terminal configurations: M6 nut and bolt terminals

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: -4°F (-20°C) to 140°F (60°C)

Case: ABS Plastic

Charging Characteristics:

Cycle Applications: Limit initial current to 12A. Charge until battery voltage (under charge) reaches 14.40 to 14.70 volts at 68°F (20°C). Hold at 14.40 to 14.70 volts until current drops to approximately 400mA. Battery is fully charged under these conditions, and charger should either be disconnected or switched to "float" voltage.
"Float" or "Stand-By" Service: Hold battery across constant voltage source of 13.50 to 13.80 volts continuously. When held at this voltage, the battery will seek its own current level and maintain itself in a fully charged condition.

NOTE: Due to the self-discharge characteristics of this type of battery, it is imperative that they be charged after 6-9 months of storage, otherwise permanent loss of capacity might occur as a result of sulfation.