3.7V Lithium Battery Manufacturer

  • Custom 3.7V lithium battery since 2010
  • Provide from 100mAh to 3000mAh battery.
  • Size/dimension can be customized.
  • PVC wrap, ABS, Metal housing can be chosen.
  • Short-circuit, over-current, over-voltage protection.
803040 battery

Custom 3.7V lithium battery

Our company has 10 years of experience in lithium battery production, professional and efficient to provide personalized lithium battery customization, its main application areas are lighting products, fans, toys, medical and other products. The main features of our products are high energy density, high cycle life and high safety.

503040 3.7V 550mAh lithium battery

303450 3.7V 500mAh lithium battery

102535 3.7V 800mAh lithium battery

674360 3.7V 1950mAh lithium battery

802040 3.7V 600mAh lithium battery

803040 3.7V 1000mAh lithium battery

Lithium Battery Process Work Flow

We are a professional lithium battery factory in China. Now we briefly introduce how to produce lithium batteries. It starts from cathode & anode mixing, coating, baking, calendering, automatic slitting & cutting, winding, top & side sealing, electrolyte injection, pressing formation, forming, capacity grading, OCV1 & OVC2, cell to PCB, insulation and shipping. Welcome to contact and ask for the workflow table list.

Need Any Customized 3.7V Lithium Battery?

Applications for lithium battery

  • Most customers tend to select connectors to the mainboard, which can save money and lab costs for soldering. It will be worse in case of lab operation errors.

  • In the right images, we showed the most used connector/plugs. They are JST, Molex, XH, PH, and other models. Each one has different metal spacing of 1.25mm, 1.5mm, 2.0mm, 2.5mm, 2.54mm.

  • We shall also consider the female and male two types. Because both shall be paired. According to our 8 years experience, most batteries are equipped with male plug. 

  • When you have specific unique connector requests, please share the excat model or this URL for refer.
plug for polymer batteries

3.7V Lithium Polymer Battery Specs

803040 3.7V 1000mAh lithium polymer battery

402035 3.7V 250mAh lithium polymer battery

103048 3.7V 1500mAh lithium polymer battery

Lithium Polymer Battery Manufacturing Process


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.


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

Sample Test

Assist and track customer test resutls, 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.

Mass Production

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

battery certificate

Contact us for 3.7V lithium battery solution

Why choose us, HlcBattery?

  • Safety & Reliability
    All Battery cells will pass rigorous testing. All Battery Packs are Certified and are compliant with regulatory and safety requirements. 
  • Certifications
    CE, ROHS, FCC certification and high reliability. UL 1642, UL 2054, MSDS, UN 38.3, IEC 62133,KC,PSE,BIS certifications and more available.
  • Customer support
    Quick turn-around on battery assemblies(30-35 Days). 24*7 services are available.

Ask For A Quick Quote

We will contact you within 1 working day, please pay attention to the email with the suffix “@hlcbattery.com”