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551429 Polymer 3.7 V Lithium Battery 420mah For Epidemic Prevention Equipment-16 years lithium battery expert

551429 Polymer 3.7 V Lithium Battery 420mah For Epidemic Prevention Equipment

Basic Information
Place of Origin: CHINA
Brand Name: HB
Certification: ROHS
Model Number: 551429-420mAh
Minimum Order Quantity: Contact sales to get
Price: Contact sales to get
Packaging Details: Contact sales to get
Delivery Time: Contact sales to get
Payment Terms: T/T
Supply Ability: Contact sales to get
Detail Information
NominalVoltage:3.7V NominalCapacity:420mAh
Warranty:1Year CycleLife:300Times
StandardDischargeCurrent:0.2C 11

Product Description

551429 polymer lithium battery 420mAh Epidemic prevention equipment battery 3.7V


Lithium Polymer Battery Advantages


1. Safe And Reliable
2. Quality Assurance

3. Price Concessions
4. Long cycle life

5. High energy density
6. No memory effect
7. Environmental protection (not Contain Cadmium, Lead, Mercury)
8. One year warranty



Size and capacity can be customized according to your requirements!

Mainly used in GPS, MP4, watches, earphones and other digital production, etc.

1. Technical Parameters


Items Rated Performance Remarks
Nominal Capacity 420mAh

Discharge at 0.2C after standard charge fully

Nominal Voltage 3.70V  

End-of-Voltage at end of Discharge


End-of-Charging Voltage

AC Impedance  ≤100 mΩ AC 1KHz
Standard Charge 0.5C CC/CV→4.25V 0.05Ccutoff Charge time: Approx 2.5h.
Standard Discharge 0.2C CC→2.75V cutoff  
Fast Charge 0.21A →0.05C cut off  Charge time: Approx 1h.
Fast Discharge 0.21A→7.5V cutoff  
Maximum Continuous Charge Current 0.1A  
Maximum Continuous Discharge Current 0.42A  

Operation Temperature Range

Charge: 0~60℃ Humidity /湿度60±25%
Discharge: -20~60℃

Storage T/H Range



Test method and request

Items  Test Method  Request


By sight

No obvious flaw,blot, scratch distorted, tympanic.

Open-Circuit Voltage

The open-circuit voltage shall be measured within 24 hours after the standard charge.




Impedance Resistance

≤100 mΩ

Nominal Capacity

0.2CB5BA discharge

Discharge Capacity


Cycle Life


Test condition: temperature:

First step:0.5C CC/CV to 4.2V

Second step: Static 10 min

Third step:0.2C CC to 2.5V.

Fourth step: Static 10 min

Fifth step: Repeat the first step to fourth step 300cycles, record 300cycle then compare with first cycle value.

Sixth step: end

Higher than 80% of the Initial Capacities of the Cell


2. Safety Performance


Items Test Method and Condition Criteria

Over-Charge Protection

At 20±5℃ conditions, after full-charging the battery with 0.5C and set the constant current and voltage supplier with 2times of the nominal voltage and current, then load it to the battery for 8h.

The battery should be no leakage, deformation, smoking and explosion during the test processes.

Over-Discharge Protection

At 20±5℃ conditions, discharge battery to 6.0V with 0.5C constant current, then discharge with 30Ω loading for 24 hours. Check the appearance of the battery.

The appearance is normal,
No explosion, No fire,
No smoking, No leakage.

Short-Circuit Protection

After fast-charging, use a cable of 0.1Ω resistance to short the battery for 1 hour. Then check the appearance of the battery.
Cut circuit of resistance; test the battery’s voltage after charging with 1C constant current for 5 seconds.

The appearance is normal,
No explosion, No fire,
No smoking, No leakage.



 551429 Polymer 3.7 V Lithium Battery 420mah For Epidemic Prevention Equipment 0