18650 21700 cells

Battery Cells – The Power Heart of Your Devices

Welcome to the world of reliable power sources! At CityLion.pl, you’ll find high-quality 18650 cells and 21700 cells that form the foundation for powering many modern electronic devices. Our products stand out with excellent technical parameters, long lifespan, and safety of use.

What are lithium-ion cells and why should you choose them?

The 18650 battery is one of the most popular types of lithium-ion cells available on the market. The name “18650” refers to the cell dimensions – 18 mm in diameter and 65 mm in length. These compact power sources have found applications in flashlights, electronic cigarettes, laptops, and even in advanced electric vehicles.

Meanwhile, 21700 cells represent a newer generation of batteries, offering even greater capacity and efficiency compared to their predecessors. Thanks to increased dimensions (21 mm diameter and 70 mm length), these cells can store more energy while maintaining high safety parameters.

Why have lithium-ion cells dominated the market?

High energy density – more power in a smaller volume
No memory effect – possibility to charge at any time
Low self-discharge rate – longer storage
High number of charging cycles – economical solution

18650 Cells – A Universal Solution for Many Applications

Every 18650 cell in our offer undergoes rigorous quality tests, guaranteeing safety and reliability. At CityLion.pl, you’ll find cells from renowned manufacturers who are leaders in the industry. Our 18650 batteries are characterized by:

Capacity ranging from 2000 to even 3600 mAh
Stable nominal voltage of 3.7V
Low self-discharge level (below 3% per month)
Built-in protection against overcharging and short circuits

18650 cells perform excellently in emergency lighting systems, tactical flashlights, power banks, and many other devices requiring a reliable power source.

21700 Cells – The Future of Battery Technology

21700 cells represent an evolution in the world of lithium-ion batteries. Their increased capacity (up to 5000 mAh) and ability to deliver higher currents make them an ideal choice for devices with increased power requirements. In our offer, you’ll find 21700 cells designed for:

Advanced high-power flashlights
Cordless power tools
Emergency power systems
Modern electrical devices

How to choose the right cell for your needs?

The choice between an 18650 cell and a 21700 cell depends primarily on the application and compatibility with your device. When making your selection, pay attention to:

Capacity – expressed in mAh, it determines the amount of energy the cell can store
Discharge current – the maximum current the cell can deliver (an important parameter in high-power consumption devices)
Presence of protection – protected cells have an additional electronic circuit safeguarding against overcharging
Manufacturer – choose cells from reputable manufacturers that guarantee quality and safety

Safety of Using Lithium-Ion Cells

Regardless of whether you choose an 18650 battery or a 21700 cell, remember the basic safety rules:

Use compatible chargers designed for lithium-ion cells
Avoid extreme temperatures that can affect the performance and lifespan of the cell
Do not allow the cells to completely discharge
Store unused cells in a cool, dry place at a charge level of 40-60%

At CityLion.pl, you’ll find not only high-quality 18650 cells and 21700 cells, but also professional chargers that will ensure safe and efficient charging of your batteries.

Why buy cells from CityLion.pl?

We offer only original and tested 18650 cells and 21700 cells from renowned manufacturers. Each 18650 battery available in our store undergoes quality control, so you can be sure that you are receiving a product with the declared parameters. Our offer is regularly updated with the latest cell models, providing access to the best solutions available on the market.

We invite you to explore our offer and choose the ideal cell for your needs!