Round LiPo battery

Coin shape 3.7v Lithium polymer battery for instruments

Round LiPo battery looks like a coin or button, Compared to conventional primary 3v battery, it has great advantages on energy density and discharge performance, what’s more, its economical in long term because its rechargeable, and it’s convenient to use, as consumers doesn’t need to replace it and install new ones frequently.

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Visitor guidance

1-What is round LiPo battery.

Round LiPo battery is a flat coin shaped lithium polymer battery designed for round space in electrical devices and instruments.The original purpose of making this kind battery is to make full use of the space when the device requires higher capacity within a round space, the typical application is smart watch. Round LiPo battery is always placed at back side of the watch screen.

Round lipo battery

Round lipo battery


Round battery specs:

  • Nominal voltage: 3.7 V ( or 3.8V)
  • Charging voltage: 4.2 V
  • Discharging cut off voltage: 3.0V or 2.75V
  • Charging cut off voltage: 4.2V
  • PCM(protection circuit) Required: Yes.It can also be integrated into PCBA of the device.
  • Capacity: custom
  • Diameter: 20mm~40mm
  • Thickness: 3mm~5mm

2- Advantages of round LiPo battery

  • Lighter weight
  • Higher energy
  • Better discharge performance
  • Longer cycle life
  • Convenient to use
  • No need to replace it frequently
  • Make full use of the space to get maximum power and use time.
  • No harm to environment

3- PD offers design and manufacturing of custom round LiPo battery.

We accept OEM,ODM order of round lipo battery,after checking the detailed requirements from customer applications, we will offer a design solution for the round battery and send for customer’s approval. As soon as it’s confirmed, we will start the manufacturing process.What we generally needs to know from customer are as below:

  • What application is it for.
  • What voltage will be needed.
  • The continuous and peak discharge current.
  • Max space for battery
  • Expected work time per recharge.
  • What kind of assembly
  • Operating temperature range.

3- FAQ on round LiPo battery.

    Question 1: Can you produce custom design round LiPo battery for us?

    Answer: Sure,We can customize new round LiPo battery for you with our own tooling workshop. You just need to tell us your space for the diameter and thickness of the battery, and your continuous discharge current, we will then evaluate and back to you with a solution. 

    Question 2: Can you make the round battery with a custom dimension?

    Answer: Yes. You can tell us your continuous discharge current, peak discharge current, thickness,diameter according to your device situation, then we can customize it for you.

    Question 3: What kind of Guarantee do you have for your battery?

    Answer: We offer one year warranty for our battery products, We can take responsibility to replace if the defects are caused by manufacturing after investigation.However, if the problem is caused by incorrect dispatch, wrong operating,abused use, then its beyond our responsibility.

    Question 4: How long is your lead time for the round LiPo battery?

    Answer: For battery samples, If we have the same or similar size battery cells available in stock, then the lead time is generally 4~7 days. If there is no stock, we need to take 2~3 weeks to produce it. 

    For mass production, it takes generally 30 days when there is no stock. If there is enough battery in stock, it takes about 1~2 weeks.

    Question 5: Do you have MOQ for it?

    Answer: If we have stock, you can buy any quantity, but in case that we dont have the same or similar battery you need in stock, we require an MOQ to produce it for mass production. We can also produce samples to support your project if necessary.

    Question 6: Do you offer datasheets/specifications for your round LiPo batteries?

    Answer: Yes. We will confirm with you on the main parameters of the cylindrical battery, such as the dimensions, capacity, cables, connectors,discharge current. Then we will offer official battery datasheet for your approval.

    Question 7: Can you assemble the round LiPo battery with the connector we want?

    Answer: Generally speaking,we will assemble the cylindrical lithium polymer battery with protection circuit, wires and connector if customer require it, If customer can add protection circuit in their PCBA themselves, we can then only lead out the cables from the battery tabs.

    Question 8: Can you apply battery certificates IEC62133 and UN38.3 for us ?

    Answer: Sure. We can apply different kinds of battery certificates for you on your request. The IEC62133, UN38.3,MSDS,CE,ROHS,REACH,UL,KC,CB are available.

    Contact us with your inquires(

    Tell us what kind of LiPo battery you are looking for:


    2-Capacity you hope to have

    3-Battery size/dimentions

    4-Work current of your device

    5-Cables and connector

    Contact Us

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