21700 3.7V Lithium Ion Battery 4000mAh 10C

🔋 Higher Capacity & Energy Density

 1, Compared to 18650 cells, 21700 batteries generally offer higher capacity (3000–5000mAh) 

     while maintaining similar or better discharge performance.

 2, Enables longer runtimes in devices without increasing the number of cells.

⚡ High Discharge Rate

 1, Capable of continuous discharge rates of 15A to 40A+, depending on the cell model and brand.

 2, Suitable for applications with high current demands.

🌡️ Thermal Stability

    High-quality 21700 cells feature built-in safety mechanisms (PTC, CID) and stable thermal behavior under load.

💪 Improved Efficiency for Battery Packs

    Due to their higher capacity and current output, fewer cells are needed in a pack, simplifying battery management 

    systems (BMS) and reducing weight.