Rechargeable Ni-CD Battery Pack - High Drain 3.6V 4000mAh for Power Tools & Industrial Use

 Features

1. Excellent High-Rate & Pulse Discharge: Ni-Cd chemistry excels at delivering very high currents with minimal voltage drop, making it ideal for power tools and motor starts.

2. Superior Low-Temperature Performance: Maintains a higher percentage of its capacity and performance in cold environments (-20°C) compared to other rechargeable chemistries.

3. Extremely Rugged & Long Lifespan: Withstands overcharge, over-discharge, and physical abuse better than most batteries. Can endure thousands of cycles with proper maintenance.

4. Fast Charge Capable: Can be charged at 1C or higher rates with appropriate charge termination controls.

Specification
 

Applications

• Power Tools: Cordless drills, saws, impact wrenches (especially older or professional models).

• Emergency & Backup Systems: Emergency lighting, UPS systems, where reliability is critical.

• RC Hobby Models: High-performance radio-controlled cars, boats, and aircraft requiring burst power.

• Professional & Industrial Equipment: Portable medical devices, two-way radios, railway signaling.

Warnings & Precautions

Charging 

• Use a Ni-Cd/Ni-MH Smart Charger: Always use a charger with -ΔV (negative delta voltage) detection or a timer specifically designed for Ni-Cd/Ni-MH chemistry. Never use a constant voltage charger.

• Avoid Overcharging: While tolerant, prolonged overcharge causes heat buildup and accelerates degradation. Do not leave on charge indefinitely.

• Memory Effect Management: To minimize the "memory effect," it is recommended to periodically perform a full discharge (to 3.0V) followed by a full charge cycle.

Discharging 

• Deep Discharge Tolerance: Can be fully discharged to 0V per cell without immediate damage, but regular deep cycling is not recommended for longevity.

• Current Limits: Although capable of high currents, continuous operation at the maximum rating will generate significant heat.

• Ventilation: Ensure adequate ventilation during high-rate charge and discharge to disperse gases.

Storage & Handling

• Storage State: For long-term storage (>6 months), it is best to store the pack in a fully discharged state to minimize crystal growth (memory effect).

• Reconditioning: After prolonged storage, perform 2-3 full charge/discharge cycles to restore full capacity.

• Physical Care: Avoid short-circuiting the terminals, which can generate extreme heat.