Custom 18650 Battery Pack Supplier

Company Vision: become a Chinese first-class 18650 battery pack supplier. 
Business Core: custom 18650 power supply, custom rechargeable lithium-ion battery pack.
Business Principle: treat each customer as a VIP with the best services.

custom lithium battery

How to custom 18650 battery?

As we all know 18650 battery is a lithium-ion battery with a fixed size and different performance, however, we can custom the 18650 power supply with some series and parallels combination. It can achieve different customer requests. 

Before we evaluate and produce, we would like to know the estimated max size, nominal voltage, nominal capacity, charge & discharge current rate and work temperature, as well as wire & connector information. The more accurate information customer provides, the best solution we can deliver.

The left section is our designed 18650 battery pack. You can visit our product page to get more details. 

Application of 18650 battery pack

The 18650 lithium battery is a type of cylindrical lithium battery, with a diameter of 18mm and a height of 65.0mm, with a rated voltage of 3.7V.

In order to meet the needs of more equipment, the 18650 lithium battery pack came into being. It is assembled according to 18650 cells in series and parallel to achieve higher voltage and longer discharge time.

We have been producing different 18650 battery pack, like 7.4V, 11.1V, 14.8V, 24V, 36V, 48V with different capacities. Below are some of our applications.

  1. Medical devices: blood pressure monitor, ultrasound machine, blood pressure apparatus, bp machine, stethoscope, physical therapy equipment, medical prostate therapy device.
  2. Consumer Electronics: POS machine, electric tool, emergency light power, data camera.
  3. Portable Equipment: POS terminal, handheld printing, electric toys.
  4. Industrial instrument: power truck, power pallet jack, power tools.

  5. Special equipment: robots, AGV, rail transit, emergency backup, exploration and mapping
18650 cell
18650 Battery Pack Design

Frequently Asked Questions

Most frequent questions and answers of 18650 battery packs

How to charge 18650 battery with power supply?

Intelligent charging: This is the ideal charging management method. It follows the charging algorithm mentioned at the beginning of this section and is integrated in a small SMD IC. The peripheral circuit is simple, stable and reliable, such as TP4054/4055/4056/4057 , TP4002/5000, MAX1879, etc. The main feature of this chip is that it will monitor the voltage and current at the same time when judging whether it is full, stop charging at 4.2V, or stop charging when the charging current is less than 0.01C (usually about 50mA); completely cut off after full, no trickle floating charge , but monitor the voltage at any time, if the 18650 lithium battery voltage drops to a certain value and then start charging.

Can you charge a 18650 with a 5v power supply?

A 5V power supply cannot directly charge a lithium battery.

Lithium batteries are easily damaged by overcharging, so the requirements for overcharging are more stringent. The charging termination voltage should be controlled at 4.2V±0.05V. The charging current is generally recommended to use a current of half the battery capacity, that is, 0.5C, and 1C to 2C is recommended for fast charging.

If the lithium battery is directly charged with 5V voltage, there is no way to control the charging current and termination voltage, which may cause the battery to overheat and explode or be damaged by overcharging.

It is recommended to use a dedicated charger for charging.

Can i custom my 18650 battery packs?

Yes, we can custom different 18650 battery packs for different applicants.

What's the product warranty of our 18650 battery packs?

We can guarantee 1 year product warranty after products are delivered out.

Which brand 18650 battery is best?

The best 18650 cell brands are LG, Sony, Panasonic, CATL, EVE, BAK etc.

What is the highest capacity 18650 cell?

It is 3500mAh battery, but 3350mAh minimal.

Are 18650 cell safety?

It must have a protection board in case of fire risk.

Should you charge 18650 batteries before using?

Nope, we suggest you charge to 3.9V~4.0V.

Chinese 18650 Battery Cell List

ModelCapacity(mAh)Voltage(V)Diameter(mm)Height(mm)Weight(g)
EVE-ICR18650/20P20003.718.3565.0045
EVE-INR18650/25P25003.718.3565.0048
EVE-ICR18650/26V26003.718.3065.0548
EVE-INR18650/29V28503.718.3065.0044.5
Roofer-INR18650-2000A20003.718.1064.9046.5
Roofer-INR18650-2200A22003.718.465.145.7
Roofer-INC18650-2600A26003.718.465.145.7
BAK- 18650C422003.718.365.044.0
BAK-B18650CA22503.718.465.048.0
BAK-C18650CC26003.718.465.048.0
BAK-H18650CH26003.718.465.048.0
BAK-C18650CE30003.718 465 049 0
BAK-H18650CB20003.718.465.045.0
DMEGC-INR18650-20PA20003.718.665.545.0
DMEGC-INR18650-26E26003.718.2564.9547.0
DMEGC-INR18650-29E29003.718.2564.9547.0

Overseas 18650 Battery Cell List

ModelCapacity(mAh)Voltage(V)Diameter(mm)Height(mm)Weight(g)
Samsung-INR18650-20S20003.718.4365.0048.0
Samsung-INR18650-25R25003.718.3364.8545.0
Samsung-ICR18650-26J126003.718.4065.0045.0
Samsung-INR18650-30Q30003.718.3364.8548.0
Samsung-INR18650-35E33503.718.5565.2550.0
LG-18650 HE225003.718.365.048.0
LG-18650 HD220003.718.365.048.0
LG-INR18650 MH132003.718.3965.1549.0
LG-INR18650 HG230003.718.3965.1549.0
LG-LG18650 MJ135003.718.3965.1549.0
Panasonic-UR18650-NSX26003.718.5065.3045.8
Panasonic-NCR18650BE32003.718.5065.3047.5
Panasonic-NCR18650PF29003.718.5065.3046.5
Sony-US18650VTC420003.718.3565.2045.0
Sony-US18650V322503.718.2064.943.6
Sony-US18650VTC5A25003.718.3565.047.1
Sony-US18650VTC630003.718.5065.2046.6

Write To Us

Why choose us, HLC?

  • 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(10-20 Days). 24*7 services are available.

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