• Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm
  • Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm
  • Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm
Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm

Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm

Product Details:

Place of Origin: guangdong china
Brand Name: JZFY
Certification: msds un38.3 ROHS
Model Number: 502535-400mah

Payment & Shipping Terms:

Minimum Order Quantity: 1000
Price: $0.53-$0.83/Pieces
Packaging Details: standard packaging
Delivery Time: 5-8work days
Payment Terms: L/C, T/T, MoneyGram
Supply Ability: 20000per
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Detail Information

Warranty: 12 Months Capacity: 400mAh
Nominal Voltage: 3.6V Cycle Life: 300 Times
OEM/ODM: Accepatable Charge Voltage: 4.2V
Dimensions: 5.0*25*37(mm) Type: Li-polymer Battery
MOQ: 1Pieces Application: Speaker/Electric Power Systems
High Light:

502535 400mah Bluetooth Earbud Battery


Un38.3 Bluetooth Earbud Battery 5.0mm


400mah 37mm bluetooth earphone battery

Product Description

Custom 502535 400mah 430mAh Lithium Polymer Battery For Consumer Electronics / Bluetooth Earbud Battery 3.7v


Product performance description

1. High energy density lithium polymer battery.
2. Long life cycle of charging & discharging, more than 500 cycles.
3. Thinner design & lighter weight with aluminum-plastic composite.
4. OEM & ODM services for special size of lithium polymer battery.
5. Rigorous testing to ensure the quality of all lithium polymer batteries.
6. Most inportant: competitive price.



1) Short circuit testing passed

2) Overcharge testing passed

3) Over discharge testing passed

4) 150C thermal shock test passed

5) 1.2m drop testing passed

1. Model: 502535

2. Voltage:3.7v

3. Capacity: 400mAh

4. Weight: 10.5g

5. Dimension:5.0*25*37mm




Basic Information

Dimension( thickness*width*length) 5.0*25*37(mm)
Charge voltage 4.2V
Nominal voltage 3.7V
Nominal capacity 400mAh
Fully charge voltage 4.2v
Ship out volatge 3.85-4.1v


Battery specification Charge current Standard Charging:0.5C 
Rapid charge:1.0C
Charging method Charge with constant current 0.5c to 4.2V, then chagre with constant voltage 4.2v till until charge current is less than 0.01C
Standard discharge current 0.2C
Max.discharge current 1C
Discharge cut-off voltage 2.5v
Operating enviroment Charging:10℃~45℃
Storage temperature -10℃~45℃
Cell Weight Approx: 10.5g
Battery recyle time 300 times
Warranty 12 months


Major application:

1. Widely applied in Telecommunications, Audio and Video Devices, Information Devices...Etc.

2. Portable DVD,GPS Traxker, Power bank,Flashlight,Mobile Headlight

3. Stereo set,Humidifier,Electric toy,Tablet PC,E-book,Medical device,ETC.


Company information :

ChargoFangyuan Power Technology Co., Ltd. was specializeD in manufacturing and exporting rechargeable lithium battery, like li-ion battery, li-polymer battery and LiFePO4 battery.

Over 100 models certificated by CE/KC/UN38.3, with capacity from 20mah-10000mah, various dimensions for your needs. (contact us for model lists)

  • OEM rechargeable battery manufacturer in China over 10 years
  • Specialized in Lithium polymer battery, LiFePO4 battery and Li-ion Battery pack
  • Our batteries got CE,CB,KC, BIS, IEC62133, ROHS certifications
  • We have succeeded in selling our batteries to the international markets of America, Canada, Europe, Africa, middle-east and South Asia


1. Bulk orders by Air or by Sea;
2. Our own shipper, customers' designated shipper or negotiable shipping methods;
3. Delivery Time: 1-2 working days for samples; 7-15 days for bulk orders;
4. After payment confirmation, the order will be processed in time.
5. The goods will only be delivered to the confirmed order address.


Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm 0



Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm 1


Un38.3 502535 400mah Bluetooth Earbud Battery 5.0*25*37mm 2

Market and Technical support email within 24 hours


Please contact and inform us what's the problem you met for quality issues.




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