Custom Lipo Battery Factory

We have been producing lithium polymer batteries in China since 2014. We customize different lipo batteries based on customer requests. They range from 100mAh to 3000mAh batteries. All are at competitive prices and good quality.


Short-circuit, over-charge, over-discharge protection


Heating, crush, impact, drop, vibration, and nail test


500 cycles of charge & discharge. Low self-consumption.

How to check lipo battery capacity

  • The battery capacity needs to use a special capacity test instrument (sub-capacity cabinet). Generally, a test cycle is about 5 hours, and the charge and discharge are tested at 0.5C, that is, 2 hours to fully charge and 2 hours to discharge. Put some time in between.
  • Use a special charger to fully charge the battery pack. The 48V60V72V battery has a special charger. The choice of the charger is based on the number of strings of cells x4.2V. For example, the full voltage of 20 strings is 84V. Some high-voltage versions are 4.25, and the charger is selected according to the type of cell. There are also lithium iron phosphate, which is 3.65x the number of strings. In addition, charging must be done in an open, open, and non-flammable place to prevent danger.

HLC helps you with high-quality lithium batteries.
Safe, Durable, Reliable.

Applications of Polymer Battery

Because of custom shaped size, they are widely used to many applicants with consumer electronics. Below are some examples that our batteries can meet:

  • electric tools, power drill, cordless tool, electric impact wrench, cordless power tool.
  • emergency light, flashlight & torch, camping light, security light, solar light.
  • industrial device, power testing tool.
  • solar light, street light, garden light.

Steps for production


To understand the real demands of the lithium polymer battery, you need to provide the lithium battery size, electrical performance requirements, output requirements, and functional requirements.

Quick Response

Evaluate a solution and quote the known parameters provided by the customer, also provide full datasheet for reference.

Sample Test

Assist and track customer test results, as well as customer's overall equipment operation effect.

Certificate Proceed

We will discuss with customer certificate works based on the final country and applicate requests. It may be MSDS, UN38.3, IEC62133, KC, PSE, etc.


After the customers approval, we will start to make samples for polymer batteries, and provide charging and discharging cycle curve and data.

Mass Production

Develop process documents and BOM sheet, purchase materials, arrange staff production, quality personnel monitoring, and random inspection, and package and shipment.

Do lipo batteries come fully charged

When you get a new lithium battery, it's partially charged. This partial charge is called the storage voltage. The storage voltage is where each battery charges to about 3.8 volts.

The U.S. Department of Transportation's Pipeline and Hazardous Goods Safety Administration, in collaboration with the Federal Aviation Administration (FAA), announced an interim regulation to amend the regulations governing the transportation of hazardous materials such as lithium-ion batteries in air consignment.

Of course, compared with the previous regulations, the current regulations are stricter on the management of lithium batteries. According to the latest regulations, on a special cargo plane, the power of lithium batteries as consignments shall not exceed 30%.

As follows: the percentage is the remaining capacity of the battery, and the right side is the corresponding battery open circuit voltage (OCV: open circuit voltage) 100%---4.2V 90%---4.06V 80%---3.98V 70%---3.92V 60%---3.87V 50%---3.82V 40%---3.79V 30%---3.77V 20%---3.74V 10%---3.68V 5%---3.45V 0%---3.00V

Can polymer lithium batteries be shipped by air?

Sure. However, there are some specific restrictions. According to the requirements of civil aviation regulations, airlines and airport cargo receiving and transportation departments should review the transportation documents of lithium batteries, and the most important thing is the UN38.3 safety test report of each type of lithium battery. The report can be provided by a third-party testing agency designated by civil aviation or by a battery manufacturer with testing capabilities. If this test report cannot be provided, civil aviation will prohibit the transportation of lithium batteries by air.

International Air Transport Association (IATA)
UN38.3 refers to paragraph 38.3 of Part 3 of the United Nations Manual of Tests and Criteria for the Transport of Dangerous Goods specially formulated by the United Nations for the transportation of dangerous goods, that is, it is required that lithium batteries must pass high simulation, high and low temperature cycles, Vibration test, impact test, 55°C external short circuit, impact test, overcharge test, and forced discharge test can ensure the safety of lithium battery transportation. If the lithium battery is not installed with the equipment, and each package contains more than 24 cells or 12 batteries, it must also pass the 1.2-meter free drop test, etc. At the same time, the total weight of the lithium battery cannot exceed 10Kg (including the packing box).

Can lithium batteries be recycled?

There are many types of lithium-ion batteries used in electric vehicles today. In fact, the batteries used in electric vehicles are completely different from those used in mobile phones and laptops. However, these batteries have a limited service life, and electric vehicle batteries may require It can no longer be used after more than ten years, so it needs to be recycled in time after being scrapped. One of the arguments against EVs is that they are an environmental nightmare compared to gasoline-powered vehicles. In a few years there will be millions of old car batteries that are no longer usable, but critics never thought recycling was a viable solution, after all, humans have been working on recycling materials for decades .

battery recycle

Indeed, very few things are worth recycling. People are used to throwing waste in the trash and disposing of it directly, but in the case of lithium-ion batteries, recycling is a profitable business, but is the recycled battery still usable? ? According to Jeffrey B Straubel, CEO of Redwood Materials and co-founder and former CTO of Tesla, recycled materials from lithium-ion batteries tend to follow the manufacturing and refining process. becomes purer with each additional cycle. Not only does the recycling process not affect the performance of the battery, it also improves the quality, resulting in a better battery. This is a surprising result, but recent scientific research has confirmed that recycled batteries not only perform as well as new, but last longer and charge faster.

This is an entirely new recycling technology that keeps most of the cathode intact while scrapping all other materials in the battery. Next, fresh materials such as nickel and cobalt are added to the cathode to ensure the chemical composition is in just the right ratio. The result is an effectively renewed cathode powder, composed of tiny crystalline particles that can stick to metal strips and put into “new” batteries.

The researchers found that the recycled powder particles were more porous and therefore had more exposed surface area than cathodes made from scratch. In other words, recycled batteries can be charged faster than batteries using freshly mined materials. Although the process is still in the research phase, Ascend Elements, a company specializing in lithium-ion battery recycling, is scaling up production. The ultimate goal is to extend this process to new batteries, with all cathodes having a porous structure that allows for improved performance. In the near future, recycled lithium-ion batteries will not only be commonplace, but popular.

HLC helps you with high-quality lithium batteries.
Safe, Durable, Reliable.

Are polymer batteries safe?

All lithium-ion batteries are afraid of overcharging and short-circuiting. When the battery is overcharged and discharged, the internal temperature of the battery continues to rise, the gas generated during activation expands, the internal pressure of the battery increases, and the pressure reaches a certain level. If the casing scars, it can rupture, causing fluid leaks, fires, and even explosions. Due to the use of colloidal electrolytes, ordinary polymer lithium-ion batteries will not explode due to the production of a large amount of gas due to the boiling of the liquid, which improves the safety.

Compared with liquid lithium-ion batteries, polymer lithium-ion batteries have the advantages of thinness, any area, and any shape. Therefore, the battery casing can be made of a lighter aluminum-plastic composite film, thereby increasing the specific capacity of the entire battery; polymer lithium-ion batteries can also use polymers as negative electrode materials, and their energy will be higher than that of current liquid lithium-ion batteries. In addition, polymer lithium-ion batteries are superior to lithium-ion batteries in both operating voltage and charge-discharge cycle life. Based on the above advantages, polymer lithium-ion batteries are called next-generation lithium-ion batteries.

Charging & discharging curve

  • 11.1V Lipo Battery Pack, It is 0.5C rate charge & 10A discharge curve test as a sample for your review.
11.1V battery charge & discharge curve 1

Time - voltage & current

11.1V battery charge & discharge curve

Capacity - voltage

11.1V battery time & voltage current curve

Time - capacity & specific capacity

Cycle number-charge capacity & discharge capacity & charge specific capacity & discharge specific capacity

Check our 3.7V lipo battery model list


Lipo Battery Certification


How long do lipo batteries last?

The theoretical life of lithium iron phosphate battery is 500 charge-discharge cycles, that is, once a day, it can also last for more than 1 year.

Can you fully discharge a lipo battery?

Deep discharge and deep charge and shallow discharge and shallow charge have little difference in the impact of lithium battery life. In fact, shallow discharge and shallow charge are more beneficial for lithium polymer battery.

Is lipo battery better?

It supports to custom different size, shape, capacity. No smoking and fire case.

What's your main product line?

We mainly produce 3.7V, 7.4V, 11.1V, 14.8V lipo battery pack for different applicants. You can also get other custom lipo battery based on customer demand.

What's leadtime for lipo batteries?

We will deliver out withou 7~10 days. Within these days, we will do at least 1 cycle of charge & discharge. It will take 30 days or more for general order. We suggest that please allow give us a little more time for aging and cycle test. It benefits a lot.

How do I maintain my lithium polymer battery?

Less than 1 month: -20℃~+45℃; Less than 6 months:-10℃~+35℃

Why Choose Us

01 Security is Paramount

At HLC, we follow and enforce Security Best Practices for all our clients, as well as internally. We educate our team and our clients on battery security to keep safe. We got your back!

02 High Touch Communication

Our goal is to answer every emails and calls with a LIVE person. It can be a problem of battery, or technical support, even free sampling.

03 Satisfaction Guaranteed

All our documents and batteries come with an unprecedented 100% efforts to support our clients.

04 Committed to Quality

We don’t pursue every customer. We choose only clients that share our values. We cherish customers who respect and support each others. It is our long-term business running principle.

05  Free samples

We can provide free samples after the technical and datasheet are approved. It will prove our lithium battery quality and manufacturing artworks.

06  24*7 Support

We will get back to you at any time and anywhere. Just let me know your ideas and requests.

HLC Battery

What They Say

We are happy to say that after our hard work and persistence, we have received praise from our customers, thank you for their support, and we will continue to work hard.

DB Technology works with some of the top brands around the world such as Bose, ZAGG, Victrola etc. We came to HLC with a very specific set of requirements needed to replace a defective battery from another “low cost” supplier. Henglichi not only met or exceeded all the specifications, including safety tests, they actually beat the previous vendors price!

DJ David
David B. James CEO

With this company, we’ve had no issues with quality, no issues with lead times and the engineering support has been excellent in designing and producing the needed battery solution for our customer’s needs. Even better, all testing services have worked perfectly to accommodate international sales with the required certifications.

customer testimonial
Saili Development and Quality Manager

Just what I needed to replace my old batteries, these are good quality batteries with a high power rating. The batteries are working really well as none have yet run out of charge for what they are being used for. I bought over 30x batteries of this company for kids toys and hand held home items. Cheaper then branded batteries and works the same.

Shayan Product Manager

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