Ultra small battery

Tiny size Lithium polymer battery for applications with small internal space

Ultra small battery is lithium polymer battery whose length and width are both very small, say less than 20mm. Among all the special shape batteries, this battery is most widely used in market for hot selling applications such as wearable devices,smart bracelet,smart watch,blue-tooth terminals.

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1-About ultra small lipo battery.

Ultra small lipo battery is a tiny size lithium polymer battery with very small width and length.This design is custom power solution for those electronics and devices with small space inside.

small lipo battery

small lipo battery

lipo battery smaller than a coin

lipo battery smaller than a coin

Ultra small lipo 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.
  • Capacity: custom
  • Thickness: 1.5mm~10mm
  • Width: 8mm~20mm
  • Length: 10mm~20mm
  • Typical application: Bluetooth headset, smart ring, smart watch,mini camera, micro sensor.

1-About ultra small lipo battery.

Ultra small lipo battery is a tiny size lithium polymer battery with very small width and length.This design is custom power solution for those electronics and devices with small space inside.

small lipo battery

small lipo battery

lipo battery smaller than a coin

lipo battery smaller than a coin

Ultra small lipo 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.
  • Capacity: custom
  • Thickness: 1.5mm~10mm
  • Width: 8mm~20mm
  • Length: 10mm~20mm
  • Typical application: Bluetooth headset, smart ring, smart watch,mini camera, micro sensor.

2- Hot small lipo battery solutions

Before small size lithium polymer battery was invented, people have to use primary coin battery such as CR1220,CR2032,CR2025,LR,AG,LIR series, these batteries are just designed for very small current applications such as some measurement devices.wearable devices engineers tried at first with these batteries, the result is disappointing, the device just doesn’t work. The main reason is they can not offer current that is big enough to run the electronics PCBA. What is more, these batteries were made with only several limited shapes and sizes. The new electronics must try to fit these shapes first, which will greatly limit the development of new designs.

When lithium polymer battery came to the market, it became hot almost suddenly, Light weight,good discharge performance,flexible custom shape design, long work time and no replacement, these features caught market’s eyes tightly. Then we find smart bracelet,smart watch,blue-tooth headphone and many other new types wearable devices are using small lipo battery for their power solution.

smart watch with small lipo battery

smart watch with small lipo battery

smart bracelet with small lipo battery

smart bracelet with small lipo battery

3- List of some small lipo batteries.


Item No.ModelCapacity mAhThickness mmWedth mmHeight mmImpedance mΩWeight g
1PD40101235410127001.0
2PD50101240510126001.2
3PD581013555.810135002.0
4PD381018353.810187001
5PD431018504.310184201.5
6PD251020252.510207000.75
7PD281020202.810207000.85
8PD30102030310206001
9PD331020403.310205001.2
10PD351020453.510203501.3
11PD381120453.811203501.5
12PD491120704.911204001.8
13PD20121210212128000.5
14PD30121525312157001
15PD40121535412156001.1
16PD451215404.512155501.2
17PD50121545512154601.5
18PD531215485.312154801.5
19PD581215505.812155401.8
20PD50121860512184201.8
21PD351219453.512194701.5
22PD481219704.812193601.8
23PD251220G302.512208001
24PD30122040312205001.5
25PD351220G523.512204801.8
26PD40122065412204001.6
27PD451220704.512203601.8
28PD481220804.812203802
29PD581220955.812202802.4
30PD601220100612203202.5
31PD50141760514174001.8
32PD551417G655.514173302
33PD60141770614174002.5
34PD251419352.514194001.5
35PD391419653.914193802.2
36PD50141980514193802
37PD5514191005.514192802.5
38PD40151548415154801.5
39PD661515856.615153902.5
40PD531518855.315183502.5
41PD7515181307.515183903
42PD30152040315205001
43PD371520653.715203651.5
44PD402020100420202802.5
45PD4820201204.820202203
46PD502020150520202003.5
47PD602020180620201404
48PD702020200720201504.5

4- FAQ on small lipo battery.

Question 1: Can you create new custom small battery model for our product?

Answer: Yes. We have our own tooling workshop to make new models, you just need to tell us your requirement for the thickness, width and length of the battery, and your expectation for the minimum capacity, we will then confirm the solution with you. Once you approve it, we can start to make the new model small battery for you.

Question 2: Can you make high discharge rate type ultra small lipo battery?

Answer: Yes. You can choose a suitable C rate from a range of 2C,5C,8C,10C,15C,20C,25C,30C,35C,40C according to your device discharge current, then we will adjust some manufacturing raw materials and technology to make it for you.

    Question 3: What kind of Gurranty do you have for your ultra small battery?

    Answer: We offer one year warranty for our ultra small lipo 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 ultra small lithium 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 your small lipo battery?

    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 ultra small batteries?

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

    Question 7: Do you assemble your ultra small battery with PCM?

    Answer: It depends. We will assemble the narrow battery with protection circuit, wires and connector if customer require it, If customer can add protection circuit in their PCBA themselves, we then will not add these accessories onto the battery.

    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(batterylipo.com)

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

    1-Voltage

    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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