3.7v 320mAh rechargeable li-ion polymer battery with UN38.3 test report

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US $0.9-1.2 / Pieces | 1000 Piece/Pieces 3.7v 320mAh rechargeable li-ion polymer battery with UN38.3 test (Min. Order)
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Quick Details
Place of Origin:
Guangdong, China (Mainland)
Brand Name:
Model Number:
Composed Type:
lithium cobalt oxide
Approx. 7.5g
Nominal Capacity:
mp3/mp4 player,bluetooth headset,etc
12 months
more flexible:
customized size/shape/capacity
good after sales service:
can replace new one if there are quality problem
high quality:
one by one test before shipment
express carrier:
long cyclelife:
300-500 times
high safety:
over-charge,ove-discharge,over-current,short circuit
Product Name:
3.7v 320mAh li-ion polymer battery with UN38.3 test report
900000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
3.7v 320mAh rechargeable li-ion polymer battery with UN38.3 test report
single battery put in insulated bag,then put into carton,each carton can't exceed 10KG;standard export carton
FOB Shenzhen
Lead Time :
10-15 working days for big order after payment or deposit

3.7v 320mAh rechargeable li-ion polymer battery with UN38.3 test report



Product Description


Nominal Voltage3.7V
Nominal Capacity320mAh
Discharge cut-off voltage2.75V
Charge voltage4.2V
Max charge voltage4.23V
Charge current0.5C
Max charge current1C
Standard discharge current0.5C
Max discharge current2C 
Operation Temperature rangecharge:0-45°c;discharge:-20-60°c
Storage Temperature rangeless than one year:-20-25°c;less tha 3 months:-20-40°c


Products show:



*Portable electronic devices

*Bluetooth headset,mobile phone,mp3/mp4 player,GPS

*Electronic cigarette,E-book,DVD

*Tablet pc,PDA,mini speaker

*DVD,portable DVD,medical devices



Main Features:

1)Low internal resistance,fast charge

2)Parameter of protection IC:over-charge protection voltage 4.20V±0.05V

3)Over-discharge protection voltage:2.7V±0.1V

4)Over-current protection:3.0±1.0A(2.7V-4.25V)

5)Temperature of discharge:-20--+60°c

6)High energy density

7)Long cyclelife

5)Environment friendly

6)No memory effect

7)Capacity,resistance,voltage,platform time consistency is good

8)High safety,over-charge,over-discharge,over-current,short circuit protection circuit

9)Low self-discharge

10)Light weight

11)1.2m drop testing passed

12)Thickness can be adjusted white the width and length keep the same

13)Doesn’t contain Mercury, No fire, No explosion, No leakage

14)High discharge rate for more powerful devices.



Cycle life test

Carry out 500cycle

Charging/Discharging in the below condition.

*Charge:Standard Charge, per 3.3.1

*Discharge:0.5 C5A to 3.0 V

*Rest Time between charge/discharge:30min.


Leakage Proof


After full charge with standard charge, store at 60±3°C, 60±10%RH for 1 month no leakage(visiual inspection)


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 an 55Hz, the excursion of the vibration is 1.6mm. The cell shall be vibrated for 30 minutes per axis of XYZ axes.

Drop Test

The cell is to be dropped from a height of 1 meter twice onto concrete ground


Packaging & Shipping


 Shipping ways:


1. For sample order or small order quantity,we usually ship them by Express like UPS,Fedex,TNT,DHL,and it will take 3-5 days to be arrived in your address(door to door)


2. For big order quantity and it is also very urgent,we suggest that you can ship them by air,we will help you to find the most economy shipping cost,and it will take 5-7 days


3. For big order quantity and it is not urgent,we stronly suggest that you can ship them by sea,and it will take 30-45 days


Our Services


1/ We can provide OEM and ODM service

2/ We can gurantee 12 months warranty

3/ If there are some quality problem,we can replace new one for you and we will also pay the shipping cost 

4/ We Gurantee all of our lithium polymer battery cell with high quality and real capacity

5/ Our professional salesperson will reply you and help you to solve problem within 24 hours

6/ We can gurantee the high quality of products,one by one test before shipment

7/ We can gurantee on-time shipment

8/ We can gurantee all of our lithium polymer battery are more safe,because there are over-charge-over-discharge,over-current and short circuit protction pcb board

9/ All PCB are customized based on the application. Seiko IC and AO MOS are provided to ensure excellent charge and discharge performance. All of our PCB is produced by domestic branded PCB manufacturer. 

10/ By offering different sizes and capacities of batteries.



1. Do not expose to, dispose of the battery in fire. 
Do not immerse in water. 

3. Avoid shorting the battery. 
4. Avoid excessive physical shock or vibration. 
5. Do not disassemble or deform the battery. 
6. Do not put the battery in a charger or equipment with wrong terminals connected. 
7. Do not use the battery mixed with other different type or model batteries. 
8. Keep out of the reach of children. 
9. The battery must be stored after charged, and should be charged and discharged 
once every 3 months.



Company Information


Certificates and factory Views:



 About US:

1.Products line:Shenzhen Delong Energy Technology Co.,Ltd isa professional manufacture,specilized in power bank,li-polymer battery,Electronic scootor battery,heating clothing battery and other related products

2.OEM/ODM service:solution design,can produce different shape and capacity lithium polymer battery

3.Payment:30% deposit for volume production,and balance before delivery or after copy of Bill

4.Main markets:40% in domestic,60% in oversea markets

5.We are 100% confident that our quality,price and service will satisfy you




Q:Are you trading company or manufacturer?

A:Of course,we are professional lithium polymer battery manufacturer,welcome to visit our factory.



Q:How about the warranty for this appliance?

A:one year warranty


Q:Does your lithium polymer battery pass some certificates?

A:Yes,most of our batteries have CE,ROHS,FCC,MSDS and UN38.3 certificates.


Q:How do you usually ship the goods?

A:We usually ship the goods by sea,air or international express like DHL,UPS,Fedex,TNT,EMS.,etc


Q:How about your products quality?

A:All of our  lithium polymer battery with Grade A quality and real capacity


Q:How about the leadtime?

A:for samples,the leadtime is only 2-3 days;for large order quantity,the leadtime is about 10-15 working days after payment or deposit