Fuhua Battery GFM-400/2V 400Ah Technical Parameters

Specifications 6

• Rated Voltage: 2V
• Rated Capacity: 400Ah (10HR, 25°C)
• Dimensions: Length 175mm × Width 210mm × Height 330mm (Total Height 365mm)
• Weight: Approx. 25.5kg
• Internal Resistance: Approx. 0.36mΩ (25°C)
• Number of Terminals: 4
• Charging Method: Constant voltage with current limit recommended
• Float Charge Voltage: 2.23 - 2.27V (25°C)
• Maximum Charging Current: 0.25C₁₀ Amperes (25°C), i.e., 100A
• Operating Temperature Range: -20°C to +45°C
• Capacity Retention Rate: Greater than 97% per month (25°C)
• Case Material: ABS (Flame-retardant ABS material optional)
• Design Life: 10 - 12 years float service life for 2V standard series (25°C)

Performance Features

• Safe and Reliable: Utilizes a highly reliable double-sealed terminal structure with excellent impact resistance and sealing performance, ensuring no electrolyte leakage1. Equipped with a domestic explosion-proof acid filter safety valve, featuring appropriate opening and closing pressure, providing explosion-proof and acid mist filtration functions. It releases excess gas during overcharging to prevent battery swelling and acid mist escape1.
• Excellent Performance: Made with pure raw and auxiliary materials and additives, along with specially formulated electrolyte, resulting in low internal resistance, excellent high-rate performance, and strong charge acceptance1. The electrolyte uses American fumed silica, which remains in a gel state within the finished battery without flow, leakage, or electrolyte stratification1. The battery has a large thermal capacity, reducing the risk of thermal runaway, is less prone to drying out, and can be used in harsh environments3.
• Resistant to Various Conditions: Good vibration resistance—when fully charged and secured, the battery can withstand vibration at 4mm amplitude and 16.7Hz frequency for 1 hour without leakage, swelling, or rupture, with normal open-circuit voltage2. Good impact resistance—when fully charged, the battery can be dropped naturally from 20cm height onto a 1cm thick hardwood board three times without leakage, swelling, or rupture, with normal open-circuit voltage2. Good over-discharge resistance—at 25°C, a fully charged battery subjected to constant resistance discharge for 3 weeks retains over 75% of its capacity2. Good overcharge resistance—at 25°C, a fully charged battery charged at 0.1C₁₀ for 48 hours shows no leakage, swelling, or rupture, maintains normal open-circuit voltage, and retains over 95% capacity2.

Application Areas 3

• Communication Systems: Such as communication base stations, switch rooms, etc., providing reliable backup power for communication equipment.
• Power Systems: Suitable for substation DC panels, relay protection devices, etc., ensuring stable operation of power systems.
• Emergency Lighting Systems: Provides power for emergency lights during emergencies to ensure illumination.
• Automation Control Systems: Supplies stable backup power for automated equipment.
• Fire Protection and Security Alarm Systems: Ensures related equipment operates normally during emergencies such as fires.
• Solar and Wind Energy Systems: Serves as an energy storage unit to store excess electricity and improve energy utilization efficiency.
• Other Fields: Also used for computer backup power, portable instruments, medical system equipment, etc.