INR21700-4000 40A High Drain Battery Cell | 4000mAh Wholesale Supplier
Power Your Devices with Reliable 21700 Cells
The INR21700-4000 is a premium high-rate cylindrical lithium-ion cell designed for demanding applications. Combining a 4000mAh capacity with a massive 40A continuous discharge rate, it is the perfect power source for power tools, cordless vacuums, drones, and high-drain energy storage systems.
We are a trusted wholesale 21700 battery supplier. We hold massive inventory of genuine SunPower cells and offer highly competitive pricing for bulk orders.
Core Specifications
| Parameter | Specification |
|---|---|
| Model | INR21700-4000 |
| Nominal Capacity | 4000mAh (Min. 3900mAh) |
| Nominal Voltage | 3.70V |
| Max Charge Voltage | 4.20V ± 0.05V |
| Standard Discharge Cut-off | 2.50V |
| Max Continuous Discharge | 40A (with 75°C temperature cut-off) |
| Max Pulse Discharge | 80A (2 seconds) |
| Max Charge Current | 6A |
| AC Impedance | ≤ 15.0mΩ (at 1000Hz, 30% SOC) |
| Dimensions | Diameter ≤ 21.3mm, Height ≤ 70.4mm |
| Weight | ≤ 68g |
Key Performance Highlights
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Excellent High-Rate Discharge: Delivers outstanding capacity even at extreme currents. At 20A discharge, it maintains over 3700mAh.
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Long Cycle Life: Tested for 300 cycles at 4A charge / 20A discharge, retaining ≥60% capacity.
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Wide Temperature Tolerance: Reliable operation from -20°C to 75°C discharge.
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Superior Safety: Passed rigorous abuse tests including overcharge, crush, short circuit, and thermal cycling with zero fire or explosion.
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Consistent Quality: Strict voltage (≤10mV), impedance (≤2mΩ), and capacity (≤1%) matching for reliable battery pack assembly.
Why Buy From Us?
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Ready Stock: Large quantities available for immediate dispatch.
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Wholesale Pricing: Direct supplier pricing to maximize your profit margins.
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Authentic Cells: Guaranteed original manufacturer quality with a 12-month warranty.
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Expert Support: We assist you in selecting the best high-drain cells for your specific BMS and pack design.
Get a Quote Today
Looking for a reliable 40A 21700 battery supplier? Don’t let supply chain issues slow down your production.
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Note: Please ensure your battery management system (BMS) is configured for a 2.50V – 4.25V operational range for optimal safety and lifespan.
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