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    1. Application

      3.7v 4000mah 21700 5C Cylinder li-ion battery

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

      battery

      3.7v 4000mah 21700 5C Cylinder lithium polymer lipo batteries


      cylindrical lithium ion battery

      cylindrical lipo battery

      rechargeable lipo battery


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


      Item

       

      Parameters

       

      Remark

      Rated Capacity

      Typical

      4000mAh

      standard discharge(0.2C)

      Cut-off voltage:2.75V

      Minimum

      3900mAh

      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 

       

      Warnings:

      Do not submerge the battery in the water.
      Do not mix fresh batteries with used batteries.
      Do not mix batteries with metal stuff together.
      Do not insert batteries with the (+) and (-) reversed.
      Do not use Efest batteries with defective E-cig mods.
      Do not disassemble, dispose in fire, heat or short circuit.
      Do not put the battery in a charger or equipment with wrong terminals connected.

       

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


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

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


      cylindrical li ion battery

      4000mAh lipo battery

      3.7V lipo battery

      lipo battery mah

      cylindrical lithium ion battery sizes

      battery


      lipo 3.7 battery

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      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.


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      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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      亚洲成AV人影片在线观看

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