Wholesale High Capacity Lithium Ion 18650 3.7V 2600mAh Rechargeable Li-ion Battery

• Type: Li-ion Battery
• Cathode Material: LNO
• Rechargeable: Yes
• Size: Small
• Delivery Time: 30days
• Transport Package: Pack
• Model NO.: 3.7v
• Specification: 18650
• Trademark: EVERBRIGHT
• Origin: China
• HS Code: 85078020
• Production Capacity: 500000 Packs

Product Description

Product Description

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

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 1KH_Z after 50% charge

Maximum charge current

1C

2600mA

Continuous charging mode

Maximum discharge current

5C

13000mA

Discharging performance
 

 

0.2C	100%
1C	≥97%
2C	≥94%
3C	≥92%
5C	≥88%

Different dated discharge to 2.75V after standard charge
 

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.

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

2.Electrical characteristics

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 300^th cycle	≥70% of initial capacity
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%
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

Table 3 

Discharge Temperature	-20ºC	25ºC	60ºC
Discharge Capacity (0.2 C5A)	60%	100%	95%

3.Mechanical characteristics 

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

4.Safety performance 

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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FAQ

Q. How long does it take do deliver the products?
A. For the samples it usually takes around 7-15 days, and 20-30 days for regular orders but we kindly remind you that shipping or airline schedules may differ from each other.

Q. What is your terms of packing?
A. We generally pack our batteries in carton but if you have a registered patent, we can pack the goods in your branded boxes after your authorization letter.

Q. Do you offer a warranty?
A. We offer 18 months of warranty for our products.

Q:What is the MOQ for Durable um-4 aaa pvc jacket battery?
A. Minimum order:360,000pcs.