18500 3.7V 2000mAh High Capacity Cylindrical Lithium Ion Battery for Power Tools

Cylindrical lithium ion batteries Overview

Cylindrical lithium ion batteries are encapsulated in a cylindrical metal casing, with an internal structure consisting of an alternating wound positive electrode, separator, and negative electrode. They are named according to their diameter plus height, with common models including 18650 and 21700. The positive electrode is mostly made of ternary or lithium iron phosphate materials, while the negative electrode is mainly graphite, working in conjunction with an electrolyte and separator to conduct lithium ions. They offer advantages such as high energy density, uniform heat dissipation, good consistency, and strong stability, and are suitable for wide temperature range operation. They are widely used in electric vehicles, power tools, energy storage devices, and consumer electronics, and are one of the mainstream battery types.

Why choose UNEMETECH's cylindrical lithium ion batteries?

UNEMETECH possesses specialized technology and experience in producing cylindrical lithium-ion batteries, maintaining stable capacity, operating voltage, and safety performance. Our customers are from all over the world. We will continue to do our best to provide customers with good service and solutions and develop with our customers.

• Multiple sizes of cylindrical lithium-ion batteries are available.
• Strict quality control.
• Immediate customer support.

We offer the following services:

• Customized solutions;
• Reliable and stable performance;
• Safety-Various tests are done to ensure the safety of our batteries;
• Sample and mass production available.

Key advantages of cylindrical lithium ion batteries

• Good consistency of individual components
• Mature winding process with a high degree of automation
• Good mechanical properties due to its cylindrical structure
• Good heat dissipation

Application areas of UNEMETECH 18500 cylindrical lithium ion batteries

18500 lithium battery is a cylindrical lithium battery with a nominal voltage typically of 3.7V and a common rated capacity of 2000mAh.
It primarily uses ternary materials (such as lithium nickel cobalt manganese oxide) as the positive electrode, offering advantages such as high energy density, long cycle life, and low self-discharge rate, making it suitable for various portable electronic devices and tools. Specific applications include:

• Consumer electronics: such as walkie-talkies, Bluetooth headsets, digital cameras, portable DVDs, etc., which require stable and high-capacity power.
• Power tools: such as handheld drills, chainsaws, etc., where ternary lithium batteries provide strong discharge performance to meet high-frequency usage demands.
• Security and monitoring equipment: such as security cameras, signal transmitters, etc., where the battery's long lifespan and low self-discharge characteristics ensure continuous operation.
• Outdoor and special environment equipment: Some low-temperature optimized 18500 batteries can be used in environments ranging from -40℃ to 60℃, suitable for extreme scenarios such as ski suits, snow cameras, and cold-weather GPS positioning systems.
• Other applications include electric toys, toy cars, mining lamps, laptops, and other portable devices.

It's important to note that ternary lithium batteries are more expensive than lithium iron phosphate batteries, but their higher energy density makes them more popular in miniaturized devices. When using ternary lithium batteries, it is recommended to choose products with safety certifications (such as UN38.3 and CE) to ensure reliability.

Custom configurations, including PCM/BMS protection circuits, connectors, and cable options, are available to ensure safe integration into your specific product requirements.

Technical Parameters

18500 Lithium ion Battery Dimension Figure

Quality & Safety Certifications

All UNEMETECH lithium ion batteries undergo strict quality control and comply with international safety & transportation standards, ensuring safe and reliable performance worldwide.
Depending on project requirements and target market regulations, we can provide certification documents such as CB, IEC 62133, UN38.3, MSDS, KC, PSE, BSMI, UL, RCM, CE, REACH, and RoHs 2.0 test reports, and other compliance documentation as required.

Typical Customer Feedback

“We've partnered with UNEMETECH for our power tool project. The 18500 3.7V 2000mAh lithium-ion battery delivers stable power and reliable performance, helping improve the overall reliability of our tools.”
— Product Development Manager, Power Tool Manufacturer

Custom Cylindrical Lithium Ion Battery Solutions

UNEMETECH provides customized cylindrical lithium ion battery solutions for power tools, portable electronics, IoT devices, lighting equipment, energy storage systems, and other battery-powered applications. Battery capacity, voltage, PCM/BMS protection circuits, connectors, wire lengths, labels, and battery pack configurations can be customized according to your project requirements.

Whether you need prototype samples or volume production, our engineering team can support your cylindrical lithium ion battery customization needs with reliable manufacturing, flexible configurations, and technical assistance.