| Customization: | Available |
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| Type: | Li-ion Battery |
| Cathode Material: | LNO |
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Factory supply 3.7V 18650 rechargeable battery
1.Specification
Battery cell : INR 18650 2600mAh 3.7V
| Items | Specifications | Remarks | |||||||||||||||
| Nominal Capacity | 2600mAh | 0.2C Standard discharge 0.2C=520mA |
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| Minimum Capacity | 2480mAh | ||||||||||||||||
| Nominal Voltage | 3.7V | Operation Voltage | |||||||||||||||
| End Voltage | 2.75V | Discharge Cut-off Voltage | |||||||||||||||
| Charge Voltage | 4.2V | standard charge | |||||||||||||||
| Delivery Voltage | 3.6~3.8V | Within 10 days from factory | |||||||||||||||
| Standard charging method | 0.2C constant current,4.2V constant voltage charge to 4.2V,continue charging till current decline to ≤0.01C | ||||||||||||||||
| Charge current | 0.5C | 1300mA | Standard charge, charge time about 3.5h(Ref) | ||||||||||||||
| 1C | 2600mA | Rapid Charge, charge time about: 2h(Ref) | |||||||||||||||
| Standard discharging method | 0.2C constant current discharge to 2.75V | ||||||||||||||||
| Cell Internal Impedance | ≤30mΩ | Internal resistance measured at AC 1KHZ after 50% charge | |||||||||||||||
| Maximum charge current | 1C | 2600mA | Continuous charging mode | ||||||||||||||
| Maximum discharge current | 5C | 13000mA | |||||||||||||||
| Discharging performance |
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Different dated discharge to 2.75V after standard charge |
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| Operation temperature and relative humidity range | Charge | 0~45ºC 60±25%R.H. |
Charge at a very low temperature such as blew 0ºC,will get a lower capacity and reduce cycle life of the battery | ||||||||||||||
| Discharge | -20~60ºC 60±25%R.H. |
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| Storage temperature for a long time | 25 ±2ºC 60±25%R.H. |
When half a year must be charged once, the battery with PCM is charged once every 3 months | |||||||||||||||
| Items | Test Method and Condition | Criteria | |
| Rated Capacity at 0.2C(Min.) | After standard charge, the capacity of Factory supply 3.7V 18650 rechargeable battery shall be measured on 0.2C discharge till the voltage discharge to 2.75V | ≥2480mAh | ≥100% |
| Cycle Life |
Charging and discharging battery as per following conditions: 0.2C standard charge to 4.2V cut-off; 5C standard discharge to 2.75V cut-off, continuous charge and discharge for 300 cycles, the capacity will be measured after the 300th cycle |
≥70% of initial capacity |
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| Capacity retention |
The battery to be charged in accordance with standard charge condition at 20~25ºC,then storage the battery at an ambient temperature 20~25ºC for 28 days. Measure the capacity after 28 days with 0.2C at 20~25ºC as retention capacity |
Retention capacity ≥85% |
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| Temperature dependence of discharge capacity |
Cells shall be charged as per Table 3. Cells shall be stored for 3 hours at the test temperature prior to discharging and then shall be discharged at the test temperature. | Each cell shall meet or exceed the requirements of Table 3 |
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| Discharge Temperature | -20ºC | 25ºC | 60ºC |
| Discharge Capacity (0.2 C5A) | 60% | 100% | 95% |
| Items | Test Method and Condition | Criteria |
| Free fall test | Factory supply 3.7V 18650 rechargeable battery will be fully charged in accordance with standard charge condition, then drop the battery three times from a height of 1m onto a concrete floor. The battery is dropped so as to obtain impacts in random orientations. | No Fire |
| Vibration test | After standard charging, fixed the cell to vibration table and subjected to vibration cycling that the frequency is to be varied at the rate of 1Hz per minute between 10Hz and 55Hz, the excursion of the vibration is 1.6mm. The cell shall be vibrated for 30 minutes per axis of XYZ axes. | No explosion ,No leakage, No fire |
| Pressure test | Put fully charged cell in the tablet by extruding, and the pressure between the tablet is13kN±0.78kN ,unload after reaching the maximum pressure | No fire, No explosion |
| Heavy load impact test | Put fully charged battery on the impact and 9.1kg ±0.1kg weight from the height of 610±25mm free fall, the battery fixed in a fixture gets impact, and the area of the battery's largest surface should be vertical with table. | No fire, No explosion |
| Items | Test Method and Condition | Criteria |
| Thermal exposure test | Each fully charged cell, stabilized at room temperature, is placed in a circulating air-convection oven. The oven temperature is raised at a rate of 5 °C/min ± 2 °C/min to a temperature of 130 °C ± 2 °C. The cell remains at this temperature for 10 min before the test is discontinued. | No explosion, No fire |
| Short test | The fully charged battery is to be short-circuited by connecting the positive and negative terminals of the battery with resistance load not exceed 100mΩ.Tests are to be conducted at room temperature 20~25ºC. | No explosion, No fire The Temperature of the Battery surface not exceeded than 150ºC |
We guarantee each single piece of factory supply 3.7V 18650 rechargeable battery is reliable. We promise to provide you with high quality lithium ion battery pack as well as high efficiency services.
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