21700 6350mAh High Capacity Rechargeable Lithium Ion Battery Cell 3.5V 22.23Wh for Battery Pack
High Capacity 21700 Rechargeable Lithium Ion Battery Cell
This 21700 cylindrical lithium ion battery cell is designed for battery pack integration and customized rechargeable battery solutions. With a rated capacity of 6350mAh and a nominal voltage of 3.5V, it provides 22.23Wh of rated energy in a compact cylindrical format.
The cell features a maximum discharge current of 12.7A and a maximum charging current of 6.35A under specified operating conditions. Its low AC internal resistance of no more than 8mΩ supports electrical performance evaluation for battery pack development.
With a maximum diameter of 21.40mm and maximum height of 70.75mm, this cell is suitable for battery pack designers and manufacturers looking for a high-capacity cylindrical lithium ion cell.
Key Product Features
-
6350mAh rated capacity
-
6500mAh typical capacity
-
3.5V nominal voltage
-
22.23Wh rated energy
-
12.7A maximum discharge current
-
6.35A maximum charging current
-
AC internal resistance ≤8mΩ
-
21700 cylindrical cell format
-
Charging temperature: 0°C to 45°C
-
Discharging temperature: -20°C to 60°C
Designed for B2B Battery Projects
This rechargeable lithium ion cell can be considered for customized battery pack development, portable power equipment and industrial battery applications. Final suitability should be evaluated according to the required voltage, current, thermal management and battery protection design.
Contact us with your project specifications, estimated order quantity and sample requirements.
Technical Specifications
| Item | Specification |
|---|---|
| Battery Type | Rechargeable Lithium Ion Cell |
| Cell Format | 21700 Cylindrical |
| Rated Capacity | 6350mAh |
| Typical Capacity | 6500mAh |
| Nominal Voltage | 3.5V |
| Rated Energy | 22.23Wh |
| Typical Energy | 22.75Wh |
| Limited Charging Voltage | 4.20V |
| Maximum Charging Voltage Limit | 4.25V |
| Standard Charging Current | 3175mA |
| Maximum Charging Current | 6350mA |
| Standard Discharging Current | 1270mA |
| Maximum Discharging Current | 12700mA |
| Discharge Cutoff Voltage (Test) | 2.50V |
| AC Internal Resistance | ≤8mΩ |
| Maximum Diameter | 21.40mm |
| Maximum Height | 70.75mm |
| Maximum Weight | 72g |
| Charging Temperature | 0°C to 45°C |
| Discharging Temperature | -20°C to 60°C |
| Long-Term Storage Voltage | 3.40V to 3.60V |
Discharge Rate Performance
| Discharge Rate | Relative Capacity |
|---|---|
| 1C | 100% |
| 2C | ≥95% |
| 3C | ≥90% |
Discharge Performance at Different Temperatures
| Temperature | Relative Capacity |
|---|---|
| -20°C | ≥80% |
| -10°C | ≥82% |
| 0°C | ≥85% |
| 25°C | 100% |
| 45°C | ≥90% |
| 60°C | ≥95% |
Cycle Performance
| Item | Specification |
|---|---|
| Test Cycle | 601st Cycle |
| Capacity Retention | ≥80% |
| Charging Current | 3.175A |
| Discharging Current | 1.27A |
| Discharge Cutoff Voltage | 2.5V |
Note: The above cycle performance is based on the test conditions specified in the product specification. Actual service life depends on operating conditions and battery pack design.
Temperature Management
-
Maximum cell surface temperature during charging: 55°C.
-
Maximum cell surface temperature during discharging: 75°C.
-
Follow the specified cooling requirements before recharging or discharging after reaching the temperature limits.
Safety Test References
The specification references GB 31241 and UL 1642 test methods. These references should not be interpreted as proof of product certification. Applicable certification documents and test reports should be confirmed separately.
Related Products
Related Blogs
-
6350mAh rated capacity
-
6500mAh typical capacity
-
3.5V nominal voltage
-
22.23Wh rated energy
-
12.7A maximum discharge current
-
6.35A maximum charging current
-
AC internal resistance ≤8mΩ
-
21700 cylindrical cell format
-
Charging temperature: 0°C to 45°C
-
Discharging temperature: -20°C to 60°C
1. High Rated Capacity
With a rated capacity of 6350mAh and typical capacity of 6500mAh, this cell provides a high-capacity option for cylindrical battery pack designs.
2. Compact Cylindrical Format
The 21700 format supports space-conscious battery pack configurations and customized assembly projects.
3. High Discharge Capability
Maximum discharge current reaches 12700mA under the specified conditions, supporting battery designs with higher current requirements.
4. Efficient Charging Capability
The maximum charging current is 6350mA, subject to the specified charging conditions and temperature limits.
5. Low Internal Resistance
AC internal resistance is specified at no more than 8mΩ at 1000Hz.
6. Rate Discharge Performance
The specification reports relative capacity of at least 95% at 2C and at least 90% at 3C under its stated test method.
7. Wide Discharge Temperature Range
The specified discharge operating temperature ranges from -20°C to 60°C.
8. Cycle Performance
Under the specified cycle test conditions, the discharge capacity retention at the 601st cycle is at least 80%.
Related Products
What products does YiFang offer?
YiFang specializes in batteries, chargers, battery packs, and power solutions, including Li-ion, LiMn (IMR), Ni-MH, and LiFePO₄ batteries.
Does YiFang provide OEM/ODM services?
Yes, we offer flexible OEM and ODM customization, including product design, specifications, and packaging to meet your exact requirements.
What industries use YiFang products?
Our products are widely used in e-cigarettes, UAVs, balance scooters, electric bikes, electronic equipment, toys, flashlights, and other commercial and industrial applications.
What is YiFang’s production capacity?
YiFang operates its own factory with automated production lines, producing up to 100,000 units daily, ensuring consistent quality and timely delivery.
How can I contact YiFang for orders or inquiries?
You can contact us via our website inquiry form, email, or phone. Our team is ready to provide professional guidance and customized solutions.
What industries use YiFang products?
Our products are widely used in e-cigarettes, UAVs, balance scooters, electric bikes, electronic equipment, toys, flashlights, and other commercial and industrial applications.
What industries use YiFang products?
Our products are widely used in e-cigarettes, UAVs, balance scooters, electric bikes, electronic equipment, toys, flashlights, and other commercial and industrial applications.
What warranty and after-sales support does YiFang offer?
We provide 6–12 months warranty, responsive customer support, and global insurance coverage for long-term reliability and customer peace of mind.
