21700 Battery Cells - Product

21700 Battery Cells are Advanced Cylindrical Rechargeable Lithium Batteries Designed To Deliver Higher Energy Density, Longer Runtime, And Improved Thermal Performance Compared With Traditional Formats. With A Diameter Of 21mm And Length Of 70mm, 21700 Cells Strike An Optimal Balance Between Capacity, Power Output, And Safety, Making Them One Of The Most Popular Choices For Modern Industrial, Commercial, And Energy Storage Applications.

Core Competitive Advantages

1. Capacity And Density Both Increase, Reducing Assembly Costs

Single-cell Capacity 3000-5000mAh, Approximately 30%-50% Higher Than 18650, With The Same System Reducing The Number Of Cells By 20%-30% And Simplifying The PACK Design, Lowering BMS And Structural Component Costs.Energy Density 180-260Wh/kg, Supporting 2C-11C Fast Charging And High-current Discharge. The Lithium-ion System Can Sustain Discharge At 25-50A, And The Lithium Iron Phosphate Has A Cycle Life Of ≥3000 Times (80% DOD). The Terminal Replacement Frequency Is Significantly Reduced.

 2. Standardization And Flexible Integration, Suitable For Multiple Production Lines

Steel Shell Packaging + Standardized Size, Compatible With Mature 18650 Production Lines And Automated Assembly, Production Efficiency Increased By 20%+, Stronger Consistency.Support For Series/parallel Expansion, Suitable For 12V/24V/48V Systems, With BMS Compatibility Guidelines And PACK Cooling Solutions To Solve Issues Of High-current Thermal Management And Consistency.

3. Full-chain Safety Protection, Reducing Application Risks

Steel Shell + Explosion-proof Valve + Ceramic Separator + PTC Protection, Comprehensive Protection Against Overcharge/overdischarge/overcurrent/short Circuit; Lithium Iron Phosphate Thermal Stability ≥270?, Lithium-ion Systems Through UL/UN38.3 Certification.Wide Temperature Operation (-20? To 60?), Self-discharge Rate ≤1%/month, Suitable For Outdoor And Long-term Standby, Reducing Maintenance Frequency.

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