21700 Battery Cell OEM Custom | CNS BATTERY Factory
Introduction
The 21700 battery cell has emerged as the industry standard for high-performance energy storage solutions across electric vehicles, power tools, and renewable energy systems. As a leading lithium battery manufacturer, CNS BATTERY Factory specializes in 21700 battery cell OEM custom services, delivering tailored solutions that meet the specific requirements of B2B clients worldwide. This article explores the technical advantages, customization capabilities, and manufacturing excellence that define our 21700 cell production.
Why Choose 21700 Battery Cells?
The 21700 format offers significant advantages over traditional 18650 cells. With a diameter of 21mm and length of 70mm, these cylindrical cells provide approximately 30-50% more capacity while maintaining excellent thermal management properties. Key benefits include:
- Higher Energy Density: Typical capacities range from 4000mAh to 6000mAh, enabling longer runtime for end applications
- Improved Thermal Performance: Larger surface area facilitates better heat dissipation during high-drain operations
- Cost Efficiency: Reduced cell count per pack lowers assembly costs and complexity
- Versatile Applications: Suitable for EVs, e-bikes, solar storage, and industrial equipment
For detailed specifications on our cylindrical battery offerings, visit our Cylindrical Battery Cell product page.
OEM Customization Capabilities
CNS BATTERY Factory provides comprehensive OEM custom services designed to address unique client requirements. Our customization options include:
Capacity Configuration
We offer cells ranging from 4000mAh to 6000mAh, with voltage platforms compatible with 3.6V, 3.7V, and 3.8V nominal systems. Clients can specify exact capacity requirements based on their application needs.
Chemistry Options
Our production lines support multiple chemistry configurations including NCM (Nickel-Cobalt-Manganese), NCA (Nickel-Cobalt-Aluminum), and LFP (Lithium Iron Phosphate). Each chemistry offers distinct advantages in terms of energy density, cycle life, and safety characteristics.
Branding and Packaging
Custom labeling, barcode integration, and packaging solutions ensure seamless integration into client supply chains. We maintain strict confidentiality agreements for proprietary designs.
Performance Parameters
Clients can specify discharge rates (continuous and pulse), operating temperature ranges, and cycle life expectations. Our engineering team works closely with customers to optimize cell performance for specific applications.
Manufacturing Excellence and Quality Assurance
As one of the premier Battery Manufacturers in China, CNS BATTERY Factory operates state-of-the-art production facilities with automated assembly lines. Our quality management system includes:
- ISO 9001 Certification: Ensuring consistent manufacturing processes and quality control
- Automated Production: Minimizing human error and maintaining cell-to-cell consistency
- Comprehensive Testing: Each batch undergoes capacity testing, internal resistance measurement, and safety validation
- Traceability: Full lot tracking from raw materials to finished products
Our manufacturing capacity supports both prototype development and mass production, enabling clients to scale from initial testing to full commercial deployment.
Technical Specifications
| Parameter | Standard Range | Custom Options |
|---|---|---|
| Capacity | 4000-6000mAh | Application-specific |
| Nominal Voltage | 3.6V/3.7V | 3.2V-3.8V |
| Max Continuous Discharge | 10A-30A | High-drain configurations |
| Cycle Life | 1000-2000 cycles | Extended life options |
| Operating Temperature | -20°C to 60°C | Wide temperature ranges |
| Weight | 65-70g | Optimized designs |
Partnership and Support
CNS BATTERY Factory maintains long-term partnerships with clients through dedicated technical support and responsive communication. Our engineering team provides:
- Application consulting and cell selection guidance
- Sample evaluation and testing support
- Production timeline coordination
- After-sales technical assistance
For partnership inquiries and detailed quotations, please visit our Contact Page to connect with our sales team.
Conclusion
The 21700 battery cell represents the optimal balance between performance, cost, and manufacturability for modern energy storage applications. CNS BATTERY Factory’s OEM custom services enable clients to leverage this technology with specifications tailored to their unique requirements. Through manufacturing excellence, quality assurance, and dedicated support, we deliver reliable power solutions that drive business success.
Partner with CNS BATTERY Factory for your 21700 battery cell needs and experience the advantage of working with a trusted lithium battery manufacturer committed to innovation and quality.
