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    Hot selling 21700 3.7V 4000mah rechargeable li-ion Cylindrical battery for -Ebike

    Features: 1, Longer storage life than Ni-MH Batteries 2, Light weight and higher energy density than any rechargeable battery 3, Installed IC chip will prevent the battery pack from over charge and over discharge.

    • Model:21700
    • Normal voltage:3.7V
    • Capacity:4000mAh
    • Diameter:21mm
    • Height:70mm
    • Spec: download

    Hot selling 21700 3.7V 4000mah rechargeable li-ion Cylindrical battery for -Ebike

    battery

    Item

     

    Parameters

     

    Remark

    Rated Capacity

    Typical

    4000mAh

    standard discharge(0.2C)

    after standard charge

    3Minimum

    3950mAh

    Alternating 

    Internal Resistance

    ≤20mΩ


    Nominal Voltage 3.7V  mean operation voltage

    Voltage at end of Discharge

    2.5V

    discharge cut-off voltage

    Charging at end of Voltage

    4.20V


    Standard Charge

    Constant Current 0.2C Constant 

    Voltage 4.20V 0.02C cut-off

    charge time:Approx 6.0h

    Standard Discharge

    Constant Current 0.2C end Voltage 3.0V


    Fast Charge

    Constant Current 1C Constant 

    Voltage 4.20V 0.02C5A cut-off

    charge time:Approx 2.5h

    Fast Discharge

    Constant Current 1C end Voltage 3.0V


    Cycle Characteristic

    500times(100%DOD)

    600 times(80%DOD)

    1000 times(50%DOD)

    the residual capacity is no less 

    than 80% of rated capacity at 1C rate.

    Maximum Continuous

     Discharge Current

    3C

    pulse discharge current: 5 C

    Operation Temperature Range

    Charge:0~55

    Discharge:-20~60

    60±25%R.H. bare battery

    Storage Temperature Range

    Less than 1 year:-20~25

    Less than 3 months:-20~45

    60±25%R.H. at the shipment 


    Item

     

    Parameters

     

    Remark

    Rated Capacity

    Typical

    4000mAh

    standard discharge(0.2C)

    after standard charge

    Minimum

    3950mAh

    Alternating 

    Internal Resistance

    ≤20mΩ


    Nominal Voltage 3.7V  mean operation voltage

    Voltage at end of Discharge

    2.5V

    discharge cut-off voltage

    Charging at end of Voltage

    4.20V


    Standard Charge

    Constant Current 0.2C Constant 

    Voltage 4.20V 0.02C cut-off

    charge time:Approx 6.0h

    Standard Discharge

    Constant Current 0.2C end Voltage 3.0V


    Fast Charge

    Constant Current 1C Constant 

    Voltage 4.20V 0.02C5A cut-off

    charge time:Approx 2.5h

    Fast Discharge

    Constant Current 1C end Voltage 3.0V


    Cycle Characteristic

    500times(100%DOD)

    600 times(80%DOD)

    1000 times(50%DOD)

    the residual capacity is no less 

    than 80% of rated capacity at 1C rate.

    Maximum Continuous

     Discharge Current

    3C

    pulse discharge current: 5 C

    Operation Temperature Range

    Charge:0~55

    Discharge:-20~60

    60±25%R.H. bare battery

    Storage Temperature Range

    Less than 1 year:-20~25

    Less than 3 months:-20~45

    60±25%R.H. at the shipment 


    China li-ion battery supplier1543474329617893.jpgli-ion battery manufacturerShenZhen China li-ion batteryli-ion rechargeable batteriesbattery

    ------------------------------------------------------------------------------------------------------------------------------------------------------------

    GEB specializes in the development, production and sales of custom lithium batteries. if you have any questions, please feel free to contact us.


    3.7v rechargeable battery

    rechargeable lithium battery

    lithium polymer batteries

    lithium ion battery

    lipo battery

    lipo battery 3.7v


    lithium polymer batteries

    ------------------------------------------------------------------------------------------------------------------------------------------------------------

    1,Q: What's the main product in GEB?                                                                       

       A: Rechargeable battery. Li-ion, Lipo battery and power battery pack.

    2,Q: What is overcharge?                                                                                             

       A: After charge, tested the batteries' initial state and capacity. Charge to 10.0V at 3C current, then charge to 0.01C at CV mode. Observe changes in battery appearance.

    3,Q: What is over discharge?                                                                                       

       A: After charge, test the batteries' initial state. When the batteries are normal, discharge to 0V at 0.5C. Observe changes in battery appearance

    4. Q: Can I have a sample order?                                                                                   

      A: Yes, we accept sample order to test and check quality. Batteries can be made as require.

    5. Q: Do you have MOQ limit?                                                                                        

      A: Yes, we have MOQ limit for mass production, but it depends on battery model. Please contact us for details.

    6. Q: How about the lead time?                                                                                      

      A: Samples will takes 5-7 business days. Mass production will takes 25-30 days. It depends on quantity.

    7. Q: How about shipping and delivery time?                                                              

      A: Generally, battery will be shipped via Express, such as DHL, TNT, FedEx and UPS, delivery time is 3-5 business days. Or DDP service, delivery time is 11-15 business days. Airline and sea shipping also available.

    8. Q: What about after-sale service?                                                                             

       A: We will offer you 1 year guarantee. If there are any problems, please inform us, we will offer you positive solutions.


    ------------------------------------------------------------------------------------------------------------------------------------------------------------

    GEB specializes in the development, production and sales of custom lithium batteries. if you have any questions, please feel free to contact us.


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