Product Description
This 21700 lithium ion battery cell is designed for energy storage in devices demanding consistent voltage and capacity. Its configuration supports industries sourcing rechargeable lithium ion battery solutions for power tools, portable electronics, and electric mobility products, requiring cells with reliable discharge profiles.
The battery offers a nominal voltage of 3.6V and capacity of 4850mAh, with a continuous discharge current rating of 10A and a peak discharge capacity up to 5C. It has a low internal resistance (≤18mΩ), contributing to efficiency and safety. Shenzhen iBorn Energy manufactures the cell under ISO9001 and ISO14001 standards, including certifications like CE, RoHS, UN38.3, and UL ensuring compliance for industrial and commercial use.
Typical applications include Bluetooth speakers, solar lighting, GPS trackers, and electric scooters, where a stable 3.7 volt lithium ion battery equivalent is required. Its cycle life of over 800 cycles aligns with medium to long-term projects, making it viable for OEM/ODM procurement and lithium ion battery wholesale distribution addressing various commercial and industrial energy needs.

| Item | Specifications | Remark |
| Model No. | 21700-4850mAh | |
| Nominal Voltage | 3.6V | |
| Nominal Capacity | 4850mAh | @0.2C standard charge&discharge |
| Dimensions | 21*70mm max | Diameter*Height |
| Cycle Life | ≥800 times | |
| Charge Method | CC/CV with professional charger | |
| Charge Cut-off Voltage | 4.2V | |
| Discharge Cut-off Voltage | 2.5V | |
| Standard Charge Current | 0.2C | |
| Standard Discharge Current | 0.2C | |
| Max Continuous Charge Current | 1C | |
| Continuous Discharge Current | 3C | |
| Peak Discharge Current | 5C | |
| Recommended Operation Ambient Temperature | Charge: 0~45℃ Discharge:-20~60℃ | |
| Storage Temperature | -20~25℃ | 12 months |
| -20~45℃ | 3 months | |
| -20~60 ℃ | 1 month | |
| Internal Resistance | ≤18mΩ | |
| Weight | Approx. 46g |


