3.7 V Rechargeable 501630 210mAh Bluetooth Headphone Battery Backup

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Company Information

Dongguan Wiliyoung Electronics Co., Ltd.

CN Manufacturer, Trading Company
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Quick Details

Place of Origin: Guangdong China
Brand Name: WLY
Model Number: 501630
Type: Li-polymer
Certification: MSDS, UN38.3
Model: Bluetooth Headphone Battery Backup
Charge current: 0.2C Standard/0.5C
Charging Voltage: 4.2V
Energy: 0.777 Wh
Size: 05*16*30 mm
Capacity: 210 mAh
Warranty Time: 12 Months
Cycle life: Around 500 times
Working Temperature: Charge: 0~45 Degree, Discharge: -10~50 Degree
OEM/ODM: Available

3.7 V Rechargeable 501630 210mAh Bluetooth Headphone Battery Backup



Product Description


Brand:WLYModel:Bluetooth Headphone Battery Backup
Type:Li-PolymerCharge Current:0.2C Standard/0.5C
Capacity:210 mAhCharge Voltage:4.2V
Energy:0.777 WhSize:5*16*30mm
Cable Length:30-35mmWarranty Time:12 Months
Cycle life:Around 500 TimesWorking Temperature:Charge: 0~45 Degree, Discharge: -10~50 Degree




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 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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Production Flow




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1. Q. Can you explain in detail how you match cells for a battery pack before you assembling the pack?

A: We will do the following things before assembling the pack:

   a. Select capacity, same capacities cells for one pack

   b.  Measure the voltage, same voltage cells for one pack(difference is under 0.02v per cell)

   c.  Measure the inner resistance,same IR cells for one pack (difference is under 1m Ohm)

  All above steps are very strict to make sure the pack performance is perfect.


2.Q: How about you payment and delivery items?

A: Payment items: By T/T, 50% for deposit, and balance all before shipment. For small amount, we also accept payment via PayPal, Western Union.


3.Q.Can I have a sample order? 

A: Yes, samples orders are welcome.We can offer free samples if the quantity not above 3 pcs, you only need to pay the shipping cost.


4. Q: How to solve the quality problems after sales?

(1) Take photos & videos of the problems and send to us.

(2) Send back the physical problem battery by express to us.

(3) Engineer will analyze the defective battery within 2 working day.

(4) 1 Year Warranty after leaving our factory, our defect rate is under 1%,we'll repaired or replaced the battery for free if non-human factor quality problems be confirmed.


5.Q: How's your lead time?

   A: 2-5 days for sample, 15-25 days for large quantity.


6.Q: What kind of certificates could you provide for these batteries?

   A: We have UL,CE,CB,KC,MSDS,UN38.3 for most our current model, if It's custom-making design, usually no current certificates, we could apply for you if you need, but the related fees should be paid by your side, and if your order is big enough, certificate fees can be refunded. 


7.Q: Can your factory print our logo/brand on the product?

A: Yes, and we will do this free of charge if the order quantity is big enough, please contact us for more details.


8.Q :Can you make customized battery?

A: Of course. We have professional engineers that can give you the most suitable solution according to your special requirements.