The rechargeable batteries are lead-lead dioxide systems. The dilute sulfuric acid electrolyte is absorbed by separators and plates and thus immobilized. Should the battery be accidentally overcharged producing hydrogen and oxygen, special one-way valves allow the gases to escape thus avoiding excessive pressure build-up.
Otherwise, the battery is completely sealed and is, therefore, maintenance-free, leak proof and usable in any position.

Features:

• Absorbent Glass Mat (AGM) technology for efficient gas recombination of up to 99% and freedom from electrolyte maintenance or water adding.
  
• Not restricted for air transport-complies with IATA/ICAO Special Provision A67.
• UL-recognized component.
• Can be mounted in any orientation.
• Computer designed lead, calcium tin alloy grid for high power density.
• Long service life, float or cyclic applications.
• Maintenance-free operation.
• Low self discharge
• Warranty: 24 months

Performance Characteristics:

• Nominal Voltage: 12V
• Number of cells: 6
• Design Life: 12 years
• Nominal Capacity: 77F (25°C)
• 10 hour rate (20.0A, 10.8V): 200Ah
• 5 hour rate (35.8A, 10.5V): 179Ah
• 3 hour rate (52.9A, 10.5V) 158.7Ah
• 1 hour rate (126A, 9.6V): 126Ah

Internal Resistance

• Fully Charged battery 77°C (25°C) 4.0mOhms

Self-Discharge

• 3% of capacity declined per month at 20°C (average)

Operating Temperature Range

• Discharge: -20~60°C
• Charge: -10~60°C
• Storage: -20~60°C
• Max. Discharge Current: 1000A(5s)
• Short Circuit Current: 3300A
• Charge Methods: Constant Voltage Charge 77°F (25°C)
• Cycle use: 2.40-2.45VPC
• Maximum charging current: 60A
• Temperature compensation: -30mV/°C
• Standby use: 2.20-2.27VPC
• Temperature compensation: -20mV/°C

 Dimensions and Weight

• Length(mm / inch): 522 / 20.55
• Width(mm / inch): 238 / 9.37
• Height(mm / inch): 218 / 8.58
• Total Height(mm / inch): 223 / 8.78
• Approx. Weight(Kg / lbs): 62.5 / 137.8