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Rechargeable Ni-CD Battery Pack - High Drain 3.6V 4000mAh for Power Tools & Industrial Use
Product Details:
| Place of Origin: | China |
| Model Number: | NI-CD 4000mAh |
Payment & Shipping Terms:
| Payment Terms: | T/T,L/C |
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Detail Information |
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| Nominal Voltage: | 3.6V | Capacity: | 4000mAh |
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| Standard Charge Current: | 0.5C (2.0 A) | Discharge Cut-off Voltage: | 3.0 V |
| Internal Resistance: | ≤ 12 MΩ | Self-Discharge Rate: | ~10% Per Month |
| Storage Temperature: | -20°C To 35°C | Cycle Life: | ≥ 500 Cycles |
Product Description
Rechargeable Ni-CD Battery Pack - High Drain 3.6V 4000mAh for Power Tools & Industrial Use
Features
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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.
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Superior Low-Temperature Performance: Maintains a higher percentage of its capacity and performance in cold environments (-20°C) compared to other rechargeable chemistries.
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Extremely Rugged & Long Lifespan: Withstands overcharge, over-discharge, and physical abuse better than most batteries. Can endure thousands of cycles with proper maintenance.
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Fast Charge Capable: Can be charged at 1C or higher rates with appropriate charge termination controls.
Specification
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Voltage |
3.6 V |
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Capacity |
4000 mAh (4.0 Ah) |
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Discharge cut-off voltage |
3.0 V |
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Max. Continuous Discharge Current |
10.0 A (2.5C) |
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Peak Discharge Current (Pulse) |
20.0 A (5C) |
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Standard charge current |
0.5C (2.0 A) |
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Internal Resistance |
≤ 12 mΩ |
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Working teerature |
Charge: 0°C to 45°C |
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Discharge: -20°C to 60°C |
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Storage Temperature |
-20°C to 35°C |
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Self-Discharge Rate |
~10% per month |
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Cycle life |
≥ 500 cycles |
Applications
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Power Tools: Cordless drills, saws, impact wrenches (especially older or professional models).
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Emergency & Backup Systems: Emergency lighting, UPS systems, where reliability is critical.
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RC Hobby Models: High-performance radio-controlled cars, boats, and aircraft requiring burst power.
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Professional & Industrial Equipment: Portable medical devices, two-way radios, railway signaling.
Warnings & Precautions
Charging
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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.
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Avoid Overcharging: While tolerant, prolonged overcharge causes heat buildup and accelerates degradation. Do not leave on charge indefinitely.
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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
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Deep Discharge Tolerance: Can be fully discharged to 0V per cell without immediate damage, but regular deep cycling is not recommended for longevity.
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Current Limits: Although capable of high currents, continuous operation at the maximum rating will generate significant heat.
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Ventilation: Ensure adequate ventilation during high-rate charge and discharge to disperse gases.
Storage & Handling
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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).
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Reconditioning: After prolonged storage, perform 2-3 full charge/discharge cycles to restore full capacity.
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Physical Care: Avoid short-circuiting the terminals, which can generate extreme heat.