Samsung 21700

Premium Samsung 21700 Lithium-Ion Cells - Next-Generation Power for High-Performance Applications

The Samsung 21700 Series features authentic Samsung lithium-ion cells in the advanced 21700 format, delivering superior capacity and performance compared to traditional 18650 cells. These high-grade 21700 cells provide exceptional power for demanding applications including electric vehicles, energy storage systems, power tools, and high-performance custom battery packs.

Why Choose Samsung 21700 Cells?

🏆 Authentic Samsung Quality
Genuine Samsung cells manufactured to the highest standards in the advanced 21700 format, ensuring superior performance and reliability.

⚡ Superior Capacity Range
Available in configurations from 3000mAh to 5000mAh with impressive discharge rates up to 50A for extreme performance applications.

🔋 Advanced 21700 Format
Larger than 18650 cells (21mm diameter × 70mm length), providing significantly more capacity and power in a compact form factor.

🌐 High-Performance Applications
Perfect for electric vehicles, e-bikes, energy storage systems, power tools, and professional high-drain applications.

Complete Samsung 21700 Cell Range

Samsung INR21700-30T - 3000mAh 35A
High-power cell with impressive 35A continuous discharge capability. Perfect for power tools and high-drain devices requiring strong power delivery.

Samsung INR21700-45T - 4500mAh 50A
Ultimate performance cell with extreme 50A maximum discharge rate. Ideal for high-performance electric vehicles, power tools, and extreme applications.

Samsung INR21700-50E - 5000mAh 9.8A
High-capacity cell for applications prioritizing runtime and energy storage. Excellent for electric vehicles and energy storage systems.

Samsung INR21700-50G - 5000mAh 9.8A
High-capacity cell with excellent energy density for extended runtime applications.

Samsung INR21700-50GB - 5000mAh 15A
Enhanced capacity cell with improved discharge capability for balanced performance and runtime.

21700 Cell Specifications

Physical Dimensions
Advanced 21700 format: 21mm diameter × 70mm length (approximate). Larger than 18650 cells, providing more capacity and power in a compact form factor.

Capacity Range

• 3000mAh: High capacity with strong 35A discharge performance
• 4500mAh: Very high capacity with extreme 50A discharge
• 5000mAh: Maximum capacity for extended runtime

Discharge Capabilities
Exceptional discharge rates from moderate to extreme (up to 50A maximum depending on model), suitable for the most demanding high-power applications.

Key Features

✓ Authentic Samsung Cells
Genuine Samsung manufactured 21700 cells with verified authenticity and quality assurance.

⚡ Extreme Discharge Performance
Exceptional current delivery capability up to 50A for the most demanding power-intensive applications.

🔋 Superior Capacity
21700 format provides significantly more capacity than 18650 cells—up to 5000mAh in a compact form factor.

🌡️ Excellent Thermal Management
Advanced cell chemistry and larger format provide superior thermal management and safety characteristics.

🔬 Premium Quality Control
Every cell undergoes rigorous testing and quality control to ensure consistent performance and safety.

⚙️ Long Cycle Life
Samsung 21700 cells are engineered for longevity, delivering hundreds of charge-discharge cycles with minimal capacity degradation.

Perfect Applications

• Electric Vehicles (EVs) and E-bikes
• Electric Motorcycles and Scooters
• Energy Storage Systems (ESS)
• High-Performance Power Tools
• Custom High-Capacity Battery Packs
• Solar Energy Storage
• Backup Power Systems (UPS)
• High-Drain Professional Equipment
• Electric Skateboards and Personal Mobility
• Professional Audio and Video Equipment

The Samsung 21700 Advantage

Superior Energy Density
21700 format provides significantly more energy than 18650 cells in a compact form factor—up to 40% more capacity.

Exceptional Power Delivery
Extreme discharge capabilities up to 50A enable the most demanding high-power applications.

Advanced Format
21700 cells represent the next generation of lithium-ion technology, offering superior performance over traditional 18650 cells.

Proven Samsung Quality
Samsung's manufacturing expertise ensures reliable, consistent performance you can trust for professional applications.

Excellent Thermal Performance
Larger format provides better thermal management, enabling higher discharge rates and longer cycle life.

21700 vs 18650 Comparison

Why Choose 21700 Over 18650?

• Up to 40% more capacity in similar space
• Higher discharge rates for extreme applications (up to 50A)
• Better thermal management and safety
• Improved energy density
• Next-generation lithium-ion technology
• Longer cycle life in high-drain applications

Best Practices for 21700 Cells

Charging:

• Charge to 4.2V per cell maximum (3.6V nominal)
• Always use appropriate lithium-ion chargers with proper voltage settings
• Charge at 0.5C to 1C for optimal lifespan
• Use BMS (Battery Management System) for multi-cell packs
• Store at 3.6V-3.7V per cell for long-term storage
• Never exceed maximum charge voltage

Discharge and Usage:

• Verify discharge current stays within cell specifications (9.8A to 50A depending on model)
• Discharge to 2.5V-3.0V minimum
• Avoid over-discharge to maximize cycle life
• Use appropriate BMS with over-discharge protection
• Monitor cell temperature during high-current discharge
• Balance cells regularly in multi-cell packs
• Ensure adequate cooling for high-discharge applications

Safety and Storage:

• Store cells in cool, dry location (15-25°C optimal)
• Keep away from metal objects that could cause short circuits
• Use proper cell holders or insulation for loose cells
• Inspect cells regularly for damage, swelling, or corrosion
• Never use damaged, dented, or swollen cells
• Dispose of damaged cells properly at designated recycling centers
• Use fire-resistant storage containers for large quantities

Battery Pack Construction:

• Match cells by capacity and internal resistance for optimal performance
• Use spot welding for permanent connections (never solder directly to cells)
• Include appropriate BMS for protection and balancing
• Ensure adequate ventilation and thermal management (critical for high-discharge applications)
• Use proper insulation between cells and pack housing
• Test pack thoroughly before final assembly
• Consider active cooling for extreme discharge applications

Quality Assurance

Authentic Samsung Cells
Genuine Samsung manufactured 21700 cells with verified authenticity and quality documentation.

Rigorous Testing
Every cell undergoes comprehensive testing to ensure it meets Samsung's strict performance and safety standards.

Quality Documentation
Cells include proper documentation and specifications for professional applications.

Safety Certifications
Meets international safety and quality standards including UL, CE, and RoHS compliance.

The Next-Generation Choice

The Samsung 21700 Series represents the next generation of lithium-ion cell technology. With authentic Samsung manufacturing, superior capacity (up to 5000mAh), exceptional discharge performance (up to 50A), and the advanced 21700 format, these cells provide everything professional integrators, EV builders, and performance enthusiasts need for the most demanding high-power applications.

Samsung 21700 Series—Next-Generation Power, Superior Capacity, Extreme Performance.