The Complete Guide To Choose Lithium Battery Cell

The Complete Guide To Choose Lithium Battery Cell

By Sixpack | December 21st 2022

The 14 key factors you need to consider on how to accurately and efficiently select Li-ion battery cells.

Lina Ng

Project Manager

7 min read

Lithium-ion battery cells have a number of specifications that are important to consider when selecting a battery for a particular application.

Here are some common specifications to consider:


1. Cell Material


According to the different cathode materials, lithium-ion batteries are mainly divided into: LFP, LNO, LMO, LCO,  NCM, and NCA. Different types of cells are used in different fields.


For example: Tesla cars chooses NCA ( LiNiCoAlO2 ) cell for car battery. LFP( LiFePO4 ) usually used for home energy storage.



2. Capacity


This is the amount of energy the battery can store. Higher capacity means the battery can store more energy and provide more operating time for the device.





The voltage and current of a battery determine the amount of power it can deliver. For the same current, higher voltage can provide more power to the device.



4.Energy Density


Energy density is a measure of how much energy can be stored in a given volume or mass of the battery. The cell with high energy density will be more compact and lighter, but it may also have a shorter lifetime and may be more expensive.


5.Discharge Rate


This is the rate at which a battery can discharge its stored energy. It determines how quickly it can deliver its stored energy.

For example: If the battery capacity is 1Ah, 1C is 1A discharge 1h to complete the discharge, 5C is 5A discharge 0.2 hour to complete.



6. Charge Rate


This is the rate at which a battery can be charged, typically measured in amperes (A). Higher charge rate means the battery can be charged more quickly.

Similar to discharge rate: 1C is 1A charge 1h to complete charge, 5C is 5A charge 0.2 hour to complete.


7.Self-Discharge Rate


Self-discharge rate of a battery is the loss of power when the battery is not working, which is unavoidable. The lower the self-discharge rate, the longer the battery can maintain its power.



8.Maximum Pulse Discharge Current


Maximum pulse discharge current is the battery in order to meet the conditions of use and the need for a short period of high current pulse discharge. Pulsed current can provide a strong current in an instant to start certain devices. Like engines.



9.Operating Temperature Range


This is the range of temperatures over which a battery can be used without damaging it. Such as charging temperature, discharging temperature, maximum current operating temperature, etc.

10.Internal Resistance


All batteries have internal resistance, and lithium batteries are no exception. The resistance value of the internal resistance of lithium batteries also determines the quality of lithium batteries.



11.Life Cycle


The life cycle of a battery is a measure of how many times it can be charged and discharged before it fails. More cycles means that the battery will last longer before it needs to be replaced.





The safety of a battery is an important consideration, especially for applications where the battery is being used in a high-risk environment. It’ s generally related to the material of the cell: LFP( LiFePO4 ) is more stable than NCA ( LiNiCoAlO2 ).



13.Size And Weight


Suitable size and weight are important considerations in design and practical applications.





The cost of a battery is an important consideration for many applications.

Cheaper battery cells may not provide the same performance or life as more expensive batteries, but the right cost to choose a cell is the best choice.




To choose the right battery cell for your product you need to consider the parameters of the battery cell from many aspects. First determine the parameters you are most concerned about, and then analyze your needs and pain points, I believe you will find the most suitable battery cell.


An important thing to note is that you need to complete the selection of the core, the development of the Pack solution, the creation of the prototype, in addition to a strong network of suppliers and the ability to identify the advantages and disadvantages, etc.


SIXPACK is the professional provider of custom battery solutions in this area, capable of meeting any custom requirements and production as needed.




Frequently Asked Questions:


1 .What are the common models of cylindrical lithium batteries?

18650, 21700, 26650, 32700, ect.


2.How to pick out a good lithium battery?

1.Check the appearance and packaging.

2.Compare the weight. In general, the weight of lithium batteries is directly proportional to the capacity.

3.test the internal resistance and maximum current. Good quality lithium battery, the internal resistance is very small, the maximum discharge current is very large.

4.Test working with electricity. © 2022 All Rights Reserved