Apogee Lithium 6T Starting/Deep Cycle Battery US MIL-PRF-32565C 6T (LiFePO4) Battery (SD-6) Apogee sreliable,safe,robust, economical and easy to install 6T battery is engineered to meet the performance specifications and demanding requirements of the Army, Navy, Air Force, Marines and other branches of the military, federal and local law enforcement, federal agencies and commercial customers. Key Features and Benefits RELIABILITY High power density and energy density Long life cycle / high efficiency Quick charging time (15 min) Waterproof (IP67) SAFETY Intelligent battery management controlsystem NO thermal runaway, NO fire, NO explosion. Fuel gauge Remote control Best Choice for High-Energy Systems Forward Operation Bases Military Ground Vehicles Underwater Vehicles CHARGE METHOD Embedded charging circuit; charge using 30VDC power supply. Vehicle Charging: 28VDC to 30VDC Recommended Charging current: 55A Fast Charging: 220A (4C) SAFETY * Over-voltage protection * Low-voltage protection * Over-current protection * Short circuit protection * Cell Balancing * Over temperature protection * BMS leak-current sleeping design APPLICABLE STANDARDS * UN-38.3 * MIL-STD-32565 series * MIL-STD-810G * MIL-STD-461G * MIL-STD-1275 Electrical Capacity(typical) 55AH Max .Voltage 28.4V Nom .Voltage 24V Min .Voltage 20V Max .Discharge .Current 1100 A, 55 °C at 30 sec Life Cycle((Charge and discharge 1C/1C 100% DOD) 2500 Cycle life Mechanical Dimensions (L;W;H) 335mm X 300mm X 281mm Weight 21.8Kg Battery Housing ABS 94V0 Waterproof IP67 Color Coyote Brown Environmental Charge 0°C to 50°C Discharge -20°C to 71°C Storage -20°C to 60°C Humidity 10% - 90%