Aircraft Battery 20GNG40(24V/40Ah) , substitution of Russian aviation battery K8 aircraft, Russian Mi-17/171

Features

1. Extreme Environment Performance: Unmatched reliability in harsh conditions, from arctic cold to desert heat. Performance is not significantly degraded at low temperatures.

2. Robustness and Durability: Built to withstand severe vibration, shock, and mechanical stress inherent in aviation operations.

3. Overcharge Tolerance: The Cd-Ni chemistry is highly resistant to damage from prolonged overcharging, a critical safety factor in aviation electrical systems.

4. Deep Discharge Recovery: Can be fully recovered from a complete discharge (even to 0V) by applying a standard charge cycle, with no permanent damage.

5. Maintainability: Individual cells can be serviced, tested, and replaced if necessary, extending the overall life of the battery pack.

6. Proven Direct Replacement: Certified and designed to be a form-fit-function substitute for the original K8 battery, ensuring seamless integration without aircraft modification.

Specifications

Applications

• Aircraft Engine Starting: Primary power source for turbine engine ignition in Mi-17/171 helicopters.

• Emergency Backup: Powers avionics, lighting, and communication systems during generator failure.

• Ground Support: Used in ground power units (GPUs) for aircraft servicing.

• Military & Aviation: Certified for use in harsh environments (e.g., high vibration, temperature swings).

Performance Characteristics

• Operating Temperature Range: -40°C to +55°C

• Storage Temperature Range: -50°C to +50°C

• High-Rate Discharge: Capable of delivering very high current pulses (e.g., 800A - 1000A) required for turbine engine starting.

• Cycle Life: Excellent deep-cycle capability, typically exceeding 1000 cycles under proper maintenance.

• Service Life: Long operational life (15+ years) due to the robust nature of Cd-Ni chemistry.

• Shelf Life: Indefinite if stored properly in a discharged state; no permanent sulfation occurs.

Warnings & Precautions

Charging

• Use a charger specifically designed for Cadmium-Nickel (Ni-Cd) aviation batteries.

• Constant Current Charging: A typical charge rate is 8A (0.2C) for 7-8 hours.

• Float Charging: For ground support units (GPU), a float voltage of 28.0 ± 0.2V (for a 24V system) is commonly used to maintain the battery without overcharging.

• Gassing: Normal gassing (hydrogen and oxygen evolution) occurs during charging. Charge only in well-ventilated areas away from sparks or open flames.

Discharging

• Avoid Deep Discharge: Do not discharge below 1.0V per cell (20V for pack) to prevent cell reversal damage.

• High-Current Limits: Limit continuous discharge to 20C5A (800A) and peaks to 30C5A (1,200A) for ≤3 seconds.

Storage

• Partial Charge Storage: Store at 30–50% state of charge (SOC) in a cool, dry environment.

• Recharge Interval: Recharge every 3 months if stored for extended periods.

Safety

• Short Circuit Prevention: Insulate terminals when not in use; high currents can cause arc flashes.

• Transportation: Comply with IATA/ICAO regulations for hazardous materials (UN 2795, Alkaline Batteries).

• Disposal: Cadmium is toxic. Recycle through authorized facilities only. Do not dispose in landfills .

Shenzhen Manli Technology Co., Ltd. is a high-tech manufacturing enterprise specializing in the R&D, production, and sales of lithium batteries.
The product portfolio encompasses a wide range of battery types, including high-capacity, low self-discharge, power-type, and high/low-temperature variants. These products are widely utilized in various smart drones, model aircraft, emergency power supplies, lighting fixtures, toys, smart home appliances, and other consumer electronics. The company possesses comprehensive R&D, design, and manufacturing capabilities, a robust quality management system, as well as testing facilities for battery performance and safety compliance. We are fully equipped to meet customers' personalized and diverse needs with tailored solutions, delivering cost-effective and reliable battery products. Our battery products have obtained third-party certifications such as UL, CE, KC, CCC, BIS, CB, PSE, REACH, ROHS, and UN38.3.
We aspire to collaborate with like-minded partners worldwide, leveraging advanced battery technology to strive for a greener, smarter, and more sustainable future.