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Lithium Polymer Battery 3.7V

Lithium Polymer Battery 3.7V

Lithium Polymer Battery 3.7V

Product Details:

Place of Origin: China
Brand Name: DELONG
Certification: CE/ROHS/MSDS
Model Number: DEL-401120

Payment & Shipping Terms:

Minimum Order Quantity: 500pcs
Packaging Details: Standard Export Package
Delivery Time: 5-10 Working days after Payment Confirm
Payment Terms: T/T, Western Union, Paypal
Supply Ability: 10000pcs Per Day
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Detailed Product Description
Voltage: 3.7v Capacity: 50mah
Size: 4.0*11*20mm Cycle Life: More Than 500 Timess
Charging Voltage: 4.2V Max Charging Current: 1C

OEM / ODM 50mah Rechargeable Lithium Polymer Battery 3.7v 401120





Model Del-401120
Nominal voltage 3.7V
Nominal capacity 50mAh
Size thickness × width × length (mm)
Max : 4.0*11*20mm
  • High energy density
  • Safety and reliable(with PCM)
  • Long cycle life
  • no memory
  • Never explosion,stable performance,environment friendly
  • capacity and size could be customized
Weight about 12g
Max charge current 1C
Charging method charge with constant current 1C to 4.2v,then charge with constant voltage 4.2v, till charge current less than 0.01C
Max discharge current 1C
Discharge cut-off voltage 3v, the over-discharge detection voltage of PCM
Operating environment Charging, 0°C ~ 60°C ; 65±20%RH 
Discharging, -20°C~80°C ; 65±20%RH
Storage environment -20°C~45°C
storage for a long time(>3 months) and the storage condition shall be:<35°C;65±20%RH;
CycleLife (80% Prime Capacity) : >500times   
Charging Attention Charging current and charging voltage should be less than specified in the Product Specification.
The charger shall be designed to comply with Specification.





1.  Digital Products: Bluetooth, MP3,MP4,P-DVD, Cellular Phone

2.  Portable Electronics: Notebook Computers, LCD light, Digital Camera, Emergency Lighting

3.  Backup power supply, Medical Device,Electric nipper

4.  Electric bicycles, HEV, EV




Product Advantages:

1. High Energy Density.
2. High Output Voltage.
3. Excellent Security.
4. Long Cycle Life: More than 500 repeated charge/discharge cycles.
5. Fast Charge Capacity: Can be fully charged in 2 to 3 hours with a rated voltage of 4.2 per cell
6. Environmental-friendly: No Pb, Cd added
7. Dual IC chips, that can anti-shortcircuit, anti-overcharger, anti-overcurrent, anti-overload;
8. Injection Technology to make battery more stable;
9. With short-circuit production function, safe and reliable;

10. Factory mastered technology and competitive price;
11. CE/ROSH/SGS/UL/MSDS/UN38.3/IEC61233 standard.


Lithium Polymer Battery 3.7V



1. Do not throw battery into water or make it wet;
2. Keep the battery away from heat source(like fire or heater)
3. Do not throw the battery into fire or heat the battery;
4. Forbid to hammer to trample the battery;
5. Forbid disassembling the battery in anyway





1. We will ship the products within 15 workdays after receipt of payment.  
2. We can ship to you by UPS/FEDEX/DHL and so on. Other shipping terms can also be arranged according to specific requirements.  
3. We are not responsible for any accidents, delays or other issues that are the responsiblility of the shipping service.  




1.  We accept T/T , PAYPAL , Western Union and so on.  
2.  If you prefer other payment terms,please contact us in advance.

Our service:
1.  Respond in 24 hours for any inquiry and consultation on our EV battery product .
2. Take actions quickly for normal client's claim within 24 hours 
3. Good after sales service : we offer one and half year quality warranty to our client ,we will take responsibility if there is any quality
4.  Quality Control: One by one test before shippment.




1.   Q:  Can i get some samples for test?

      A  : Of course, the sample is available for test.


2.  Q:  Can you customize the size of battery whatever i asked for ?

     A: Yes, we acept the OEM and ODM.


3.  Q: The capacity of battery pack is real,right?

     A:  Of course yes.


4.  Q: Can we use the lithium polymer cell to customize the battery pack?

     A: Of course yes. Tell me your special requirement, such as the dimension, continue current, weight,               charging time, and so on, we will design the battery which can be best suitable for your project. 



Contact Details
Shenzhen Delong Energy Technology Co.,LTD

Contact Person: Ms. Iris

Tel: 86-755-61186759

Fax: 86-755-33815254

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