BENZO Energy technology Co.,Ltd !

China Lithium Battery Manufacturer OEM Special Battery for Bluetooth Headphone BZ 301120 40mAh 3.7V Rechargeable Li-Ion Polymer Battery

Availability: In stock

  • Buy 10000 for $0.90 each and save 10%

Quick Overview

Price: US $0.9-1 / Piece
Min. Order: 5,000 Pieces
Please contact us for the order !

Special Battery - BZ 301120 - 40mAh - 3.7V - Lithium Ion Polymer Battery - Rechargeable

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  • Special Battery - BZ 301120 - 40mAh - 3.7V - Lithium Ion Polymer Battery - Rechargeable
  • Special Battery - BZ 301120 - 40mAh - 3.7V - Lithium Ion Polymer Battery


    Place of Origin: Guangdong, China
    Brand Name: BZ
    Model Number: 301120
    Type: Li-polymer
    Nominal Voltage: 3.7V
    Size: 3*11*22mm
    Nominal Capacity: 40mAh
    Product name: BZ 301120
    Warranty: 1 Year
    Weight: 1g
    Cycle life: 500 Times
    Capacity: 40mAh
    Application: Battery for Bluetooth Headphone
    Certificate: CE/RoHS/UN38.3/MSDS
    Payment: Paypal.TT.Escrow.Western Union
    Max charge current: 1C

Special Battery - BZ 301120 - 40mAh - 3.7V - Lithium Ion Polymer Battery

301120 3.7V 40mAh

301120 40mAh 3.7V Rechargeable Battery

Battery for Bluetooth Headphone

Product Parameters



General Parameter



Rated Capacity

Typical:40mAh     Minimum38mAh

Standard discharge0.2C C5A) after Standard charge

Nominal Voltage


Mean Operation Voltage


Voltage at end of Discharge


Discharge Cut-off Voltage


Charging Voltage


Internal Impedance


Internal resistance measured at AC 1KHZ after 50% charge

The measure must uses the new batteries that within one week after shipment and cycles no more than 5 times


Standard charge

Constant Current 0.2C5A

Constant Voltage 4.2V

0.01 C5A cut-off

Charge time : Approx 6h


Standard discharge

Constant current 0.2 C5A

end voltage 3.0V


Fast charge


Constant Current 0.5C5A

Constant Voltage 4.2V

0.01 C5A cut-off

Charge time : Approx 2.5h



Fast discharge

Constant current 0.5C5A

end voltage 3.0V


Maximum Continuous Charge Current

1.0 C5A  

Maximum Continuous Discharge Current


Operation Temperature Range




Bare Cell


Storage Temperature Range

Less than 1 year: -20~25℃

less than 3 months: -20~40℃


at the shipment stat


Pack  Dimension

      High: max22mm          Width: max11mm
: max 3mm

Initial  Dimension


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1. Q: Where can I get the price?

A:,We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please call us 

or tell us in your email so that we'll regard your inquiry priority.


2.  Q:  Is OEM/ODM available?
A: Yes, it is. Please feel free to tell us your application and your basic battery requirements. Our R&D team will

provide a full solution to your with these factors taken into consideration: working temperature, dimension,

compound mode, power, capacity, peak current, PCM, fuse, motion control ICs, plug, etc.

3.  Q:  Can you provide samples?
A: Yes, we can. After discussion and designing with our sales and engineer, we encourage client to order samples

to test our battery quality first.


4.  Q: What kind of certificates could you provide for the battery?

A: It’s customized design, no current certificate, but we could apply CE, UL, KC,UN38.3 and other related

certificates for you, but the certificates fee needs to be paid by you, if your quantity is big enough, certificates

fee could be refunded.


5. Q: Shipping terms:

 1.Samples checking: sending by Express ( DHL / UPS / FEDEX/ TNT ,by air)

 2.Bulk production:sending out by cargo shipping / airfreight /Express(DHL/UPS/FedEx/TNT),or we can accept

other shipping terms according to your requirements.


6. Q: Can we visit your factory?
A: we aresincerely welcome you to visit our factory. Once we have your schedule, we will arrange the

professional sales team to follow up your case.


contact us

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