Custom Lithium-ion Battery Pack Manufacturer in China

Lithium ion Battery Pack

Lithium Ion has the highest power density of any rechargeable battery chemistry. It is lightweight and offers great cycle life even more than 500 which makes it the ideal product for many new design solutions.

Longsing has the capability to custom design a Lithium Ion battery pack to fit your product’s specific needs. From small single-cell packs to large battery packs, Longsing can design safe and reliable solutions to meet your specifications.

Longsing prides itself on using only the highest quality cells to make Lithium Ion battery packs. Longsing takes the utmost care to ensure that all batteries meet the highest safety standards prior to leaving our facility. See our Test Report for more information. The factory is certificated with ISO 9001, And batteries with ULUN 38.3And IEC62133MSDS.

Lithium ion Battery has High Energy Density

Low Self Discharge Rate. Long Battery Life Circle up to 500

Wide Operation Temperature -40℃ ~+80℃, Hard Conditions are OK

Cylindrical, Pouch & Prismatic forms Available

Types of Lithium Battery Packs we Make

Rechargeable lithium ion batteries are commonly used in a broad spectrum of applications, including:

  • Consumer Electronics(Laptop, Digital cameras, Video cameras, E-cigarettes and Other Portable Electronic Devices)
  • Electric vehicles, E-bikes, AGV(Automated Guided Vehicle), Golf Cart, Forklift
  • LED Work Light,Flashlights,Emergency & Exit Light,Solar Street Light
  • Military/aerospace equipment(Igniters, Gas masks, Guidance systems, Night vision, Data radios, Airborne Radio System and Target devices.)
  • Medical devices(Advanced Medical Cart, Fingertip Pulse Oximeter, HeartStart Monitor/Defibrillators )
  • and many others

Ready to get started on the custom lithium ion battery packs?  Request a quote from us today.

Lithium Battery Cell Selection

There are many different types of lithium batteries in the market. No one type works for all applications. For example, robotics need a high discharging output; power tools need high discharge C rate;

Energy storage systems need high power density; Car Jump Starter batteries need to be operable even in freezing temperatures, and batteries with daily charging/discharging usage may need a long cycle life.

That’s why you should tell us the application of your lithium battery pack.

We have been in the lithium battery application industry for more than 10 years. We are familiar with the battery supplier chain and quality is our life. We will offer you the most suitable lithium battery cells based on performance, price, and reliability.

18650 Battery Cell

Battery Management System

Battery Management System (usually short for BMS), which is an electronic regulator that mainly designed to monitor and control the charging and discharging voltage and current of lithium battery cells or other rechargeable cells.

For Battery packs that contain too many battery cells, since battery cells voltage and capacity are not performing the same all the time, that’s why BMS comes out. A BMS is a simple electronics system to measure and control voltage and current. and it will stop charging when the desired voltage is reached.

For example, in 10 cells pack, some battery cell may reach its full capacity already, while others might only 80% full. In case battery cell are already charged full, the BMS will shut down the power flow, in case there is no BMS, the already filled charged battery cell will go on with the charging and thus will short its life or even cause heat or fire.

Our BMS can monitor many more factors such as temperature, humidity,etc.. we can even send data to computer or App, so your customer can read the data on time.

Custom BMS for Your Lithium Battery Pack

Safety Regulations

Getting Safety certifications for Lithium battery packs now become compulsory steps. We will help you to get all the necessary certificates, some of the commonly known ones are listed below:
UN 38.3
IEC 62133
UL 2054
Air Transportation Report

How to Custom Lithium Battery Packs

We have the unique ability to develop custom lithium battery packs to fit your needs. Our expert team of chemists, engineers, and manufacturers who use proven chemistry and production methods that will get from spec to production fast. Smaller, thinner, flexible, more powerful.

Check More on Post: How to Custom Lithium Battery Packs in 7 Steps
FREE BONUS:  Lithium Battery Design Design ebook(2M,20 pages, PDF)  
Live Case Study, Must read for newbies:  Customer Case Study of 5V 10A Battery Pack (Order of 120,000 USD)  


Let us know your size limitations and anticipated capacity needed for your project.


We will send datasheet to you or New design according to your requirement.


We will start making samples for you if all things are set.

Wait for Samples

It takes time to make custom samples, Just have a little patience.

Why Longsing


All Battery cells will pass rigorous testing

All Battery Packs are Certified and are compliant with regulatory and safety requirements

Cells of Samsung, Sony, LG, ATL are used widely for battery packs.


CE, ROHS, FCC certification and high reliability

UL 1642, UL 2054, MSDS, UN 38.3, IEC 62133,KC,PSE,BIS certifications and more

Certificate of Conformance (COC)


We Make Battery packs with updated battery cells

Consistent, reliable, top performance cells from the industry highest quality suppliers.

Tested and proven design


Custom assembly design and engineering assistance

Quick turn-around on battery assemblies(10-20 Days)

Packaging According to Hazardous Materials Handling policy