Introduction
In today’s fast-paced world, devices demand more energy, higher power, and longer runtime than ever before. Enter the 21700 lithium-ion cell: the “next-gen” cylindrical powerhouse that’s rapidly overtaking the legacy 18650 format. With capacities ranging from 4,000 mAh to 5,500 mAh and energy densities approaching 300 Wh/kg, 21700 cells deliver the energy and performance modern applications require. At LanDazzle, we specialize in custom 21700 battery pack design, combining precision engineering, industry-leading safety protocols, and scalable manufacturing.
What Is a 21700 Battery Cell?
Definition & Form Factor
A 21700 cell measures 21 mm in diameter and 70 mm in length, making it about 10% larger than the popular 18650 format. Introduced in 2017 through a collaboration between Panasonic and Tesla, the 21700 balances increased capacity with a compact footprint.
Key Specifications
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Capacity: 4,000 mAh–5,000 mAh (up to 6,000 mAh in the latest high-capacity variants).
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Voltage: Nominal 3.6–3.7 V.
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Energy Density: 250–300 Wh/kg versus 180–250 Wh/kg for 18650 cells, a ~20% improvement.
Comparison with 18650
Compared to the 18650, the 21700 provides:
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Higher capacity for longer run times.
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Improved thermal performance, thanks to a larger surface area.
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Enhanced cycle life, as stress per cell is reduced.
LanDazzle 21700 cell Features
| Parameter | Specification |
|---|---|
| Model | 21700 |
| Dimensions (mm) | 21.15 × 70.15 |
| Max Discharge Rate | 36C |
| Rated Capacity | 5000 mAh |
| Weight (Max) | 66 g |
| Nominal Voltage | 3.6 V |
| Operating Voltage Range | 2.5 V – 4.2 V |
| Charge/Discharge Current | 15.0 A (Charge) / 125.0 A (Discharge) |
| Energy Density | 273 Wh/kg |
Key Features
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High Power Output: Delivers exceptional discharge performance for demanding applications.
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Super Fast Charge: Supports rapid charging with minimal downtime.
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Long Cycle Life: Engineered for extended durability and repeated use.
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Wide Temperature Range: Reliable operation under varying environmental conditions.
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Enhanced Safety: Built-in safeguards to ensure stable and secure performance.
Ideal for electric vehicles, power tools, and energy storage systems.
Advantages of 21700 Battery Pack Customization
LanDazzle’s 21700 battery customization service empowers businesses to tailor high-performance power solutions to their unique needs. Leveraging the core strengths of the 21700 cell, we deliver bespoke battery packs that elevate efficiency, safety, and scalability. Below are the key advantages of choosing our customization service:
1. Application-Specific Design Optimization
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Flexible Configuration: Adjust voltage (e.g., 12V, 24V, 48V) and capacity by connecting cells in series/parallel to match your device’s power requirements (e.g., drones, EVs, industrial tools).
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Compact Form Factor: Customize pack dimensions and shape to fit constrained spaces without compromising energy density (273 Wh/kg).
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Enhanced Output: Optimize discharge rates (up to 36C) for high-power applications like robotics or energy storage systems.
2. Advanced Performance Tuning
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Thermal Management Integration: Add cooling systems (liquid/air) or heating elements for stable operation in extreme temperatures (-20°C to +60°C).
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Fast-Charge Compatibility: Design packs with balanced charging circuits to support 15A rapid charging, minimizing downtime for critical operations.
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Cycle Life Extension: Implement smart BMS (Battery Management Systems) to prolong cycle life (1,500+ cycles) and prevent overcharge/discharge.
3. Robust Safety & Compliance
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Multi-Layer Protection: Custom safeguards include PTC, short-circuit prevention, and flame-retardant materials, ensuring compliance with UN38.3, CE, and RoHS standards.
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Vibration/Shock Resistance: Reinforce structural integrity for rugged environments (e.g., automotive, outdoor equipment).
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Real-Time Monitoring: Integrate IoT-enabled BMS for remote diagnostics, voltage tracking, and fault alerts.
4. Cost Efficiency & Scalability
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Material Optimization: Reduce waste by tailoring components (e.g., connectors, wiring) to your exact specifications.
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Scalable Production: From prototypes to mass production, our flexible manufacturing supports startups and enterprises alike.
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Long-Term Savings: High energy density and durability lower replacement frequency, reducing total ownership costs.
LanDazzle: Custom 21700 Battery Pack Manufacturer
At LanDazzle, we redefine power solutions through precision engineering and bespoke innovation. As a leading manufacturer of custom 21700 battery packs, we empower industries worldwide with high-performance, application-specific energy systems. Our expertise lies in transforming the raw potential of the 21700 lithium-ion cell into tailored solutions that meet the exact demands of your technology.
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Deep Technical Expertise
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Core Cell Technology: Built on our flagship 21700 cell (5000mAh, 36C discharge, 273 Wh/kg), we optimize packs for unmatched energy density, power output, and longevity.
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R&D-Driven Innovation: Collaborate with our engineers to co-design packs for niche requirements, from ultra-fast charging to extreme temperature resilience.
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End-to-End Customization
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Electrical Flexibility: Configure voltage (3.6V–48V+), capacity (5Ah–100Ah+), and discharge rates (up to 125A) for applications like EVs, drones, or medical devices.
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Mechanical Precision: Craft slim, curved, or modular packs to fit unique form factors, using lightweight materials without compromising durability.
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Smart Integration: Embed advanced BMS with IoT connectivity, thermal management, and real-time diagnostics.
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Scalable Manufacturing Excellence
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Agile Prototyping: Rapid 3D modeling and testing (4-6 weeks) to validate designs before mass production.
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Global Scalability: From small batches (<100 units) to high-volume orders (>10,000 units), we ensure consistent quality and on-time delivery.
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Cost Efficiency: Optimize material usage and lifecycle costs with packs engineered for 1,500+ cycles and 80% capacity retention.
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Uncompromising Safety & Compliance
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Multi-Layer Protection: PTC fuses, short-circuit prevention, flame-retardant casing, and explosion-proof designs.
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Global Certifications: Full compliance with UN38.3, CE, RoHS, IEC62133, and support for UL, KC, or GB/T certifications.
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Rugged Reliability: IP67/IP68 options for harsh environments (e.g., automotive, aerospace).
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Industry-Specific Solutions
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E-Mobility: High-energy packs for EVs, e-bikes, and hybrid systems with swappable designs.
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Renewable Energy: Modular storage solutions for solar/wind farms and grid stabilization.
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Industrial Tech: High-discharge packs for robotics, AGVs, and UAVs.
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Consumer Electronics: Sleek, lightweight designs for premium gadgets and outdoor gear.
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LanDazzle 21700 Battery Pack
1. 21700-6S1P lithium battery pack
The LD21700-6S1P, designed by Lan Dazzle, is a high-energy lithium-ion battery pack engineered for long-lasting performance in demanding applications. Built with precision and durability, it delivers reliable power for high-drain devices such as drones and robotics. Below are the detailed specifications:
| Model | Nominal Voltage: | Nominal Capacity | Energy | Charge Rate | Discharge Rate | Connector Type | Dimensions |
| LD21700-6S1P | 21.6 V | 5000 mAh | 108 Wh | 2C | 36C | XT60 | 42 mm × 63 mm × 70 mm |
Applications: Ideal for drones, robotics, RC vehicles, and other high-power devices requiring stable energy output.
2. 21700-6S2P lithium battery pack
The LD21700-6S2P, engineered by Lan Dazzle, is a high-capacity lithium-ion battery pack designed for extended runtime in power-intensive applications. Ideal for drones, industrial equipment, and high-performance RC models, it combines energy density with robust performance. Key specifications include:
| Model | Nominal Voltage: | Nominal Capacity | Energy | Charge Rate | Discharge Rate | Connector Type | Dimensions |
| LD21700-6S2P | 21.6 V | 10000 mAh | 216Wh | 2C | 36C | XT60 | 42 mm × 63 mm ×140 mm |
Applications: Extended-flight drones, heavy-duty robotics, and industrial tools.
3. 21700-6S3P lithium battery pack
The LD21700-6S3P by Lan Dazzle is a powerhouse battery pack tailored for ultra-high-demand scenarios. With triple parallel cells, it delivers unmatched endurance for critical applications like aerial photography drones and medical robotics. Specifications:
| Model | Nominal Voltage: | Nominal Capacity | Energy | Charge Rate | Discharge Rate | Connector Type | Dimensions |
| LD21700-6S3P | 21.6 V | 15000 mAh | 324Wh | 2C | 36C | XT90 | 42 mm × 63 mm × 210 mm |
Applications: Long-endurance drones, emergency power systems, and industrial automation.
4. 21700-6S4P lithium battery pack
The LD21700-6S4P from Lan Dazzle is a premium battery solution for applications requiring maximum energy storage and reliability. Perfect for electric vehicles, large-scale robotics, and renewable energy systems. Specifications:
| Model | Nominal Voltage: | Nominal Capacity | Energy | Charge Rate | Discharge Rate | Connector Type | Dimensions |
| LD21700-6S4P | 21.6 V | 20000 mAh | 432Wh | 2C | 36C | XT90 | 84mm ×126 mm × 70 mm |
Applications: EV prototypes, solar storage systems, and large industrial robots.
5. 21700-8S3P lithium battery pack
The LD21700-8S3P from Lan Dazzle is a premium battery solution for applications requiring maximum energy storage and reliability. Perfect for electric vehicles, robotics, power tools and energy storage systems. Specifications:
| Model | Nominal Voltage: | Nominal Capacity | Energy | Charge Rate | Discharge Rate | Connector Type | Dimensions |
| LD21700-8S3P | 28.8 V | 15000 mAh | 432Wh | 2C | 36C | XT90 | 63mm ×168mm × 70 mm |
Applications: electric vehicles, robotics, power tools and energy storage systems.
6. 21700-14S6P lithium battery pack
The LD21700-14S6P from Lan Dazzle is a premium battery solution for applications requiring maximum energy storage and reliability. Perfect for large drones or commercial UAVs. Specifications:
| Model | Nominal Voltage: | Nominal Capacity | Energy | Charge Rate | Discharge Rate | Connector Type | Dimensions |
| LD21700-14S6P | 50.4 V | 30000mAh | 1514Wh | 2C | 36C | XH2.54-15P | 126mm ×147mm × 140mm |
Applications: Electric motorcycles, ATVs, marine vehicles, industrial robotics and automation systems, and large drones or commercial UAVs.
Conslusion
Choosing the right power source is a critical decision for any business looking to innovate and excel in today’s competitive landscape. LanDazzle offers more than just battery packs; we provide tailored power solutions designed to meet the unique demands of your specific business applications. Our expertise in 21700 battery pack design and customization, combined with a deep understanding of diverse industry needs, makes us the ideal partner for businesses seeking reliable, high-performance power. Contact us today at info@sxunsolution.com to discuss your specific power requirements and discover how their custom 21700 battery solutions can drive your business forward.
