3.7 Volt


In the realm of portable electronics, 3.7-volt lithium-ion cylindrical cells reign supreme as versatile powerhouses, driving everything from smartphones to electric vehicles. With a plethora of sizes and capacities available, understanding the nuances of these batteries is crucial for selecting the optimal power source for your specific needs. 


Understanding the Basics

Lithium-ion batteries, renowned for their high energy density and rechargeable nature, have become ubiquitous in modern electronics. Cylindrical lithium-ion cells are characterized by their tubular shape, facilitating efficient packaging and maximizing energy density.

Voltage: 3.7 Volts

All the cells discussed in this guide share a common nominal voltage of 3.7 volts, making them compatible with a wide range of electronic devices. This voltage range ensures consistent power delivery and compatibility across various applications.


Sizes and Capacities

1. 10440 (AAA) - Capacity Range: 350mAh to 1000mAh

The 10440 cylindrical cell, often referred to as a AAA-sized battery, is compact and lightweight, making it ideal for small-scale applications such as flashlights, remote controls, and portable electronic devices.


2. 14430 - Capacity Range: 500mAh to 1200mAh

The 14430 cell strikes a balance between size and capacity, offering moderate energy reserves suitable for devices requiring a slightly higher power output than the 10440. Applications include LED flashlights, handheld gaming devices, and medical equipment.


3. 14500 (AA) - Capacity Range: 600mAh to 2500mAh

Similar in size to a standard AA battery, the 14500 cell delivers substantial capacity in a compact form factor. It finds extensive use in high-drain devices such as digital cameras, MP3 players, and portable audio recorders.


4. 17500 - Capacity Range: 1100mAh to 3000mAh

With a slightly larger diameter and increased capacity compared to its predecessors, the 17500 cell is well-suited for applications demanding higher energy reserves, including cordless power tools, electric toothbrushes, and handheld GPS devices.


5. 18500 - Capacity Range: 1200mAh to 3500mAh

The 18500 cell offers enhanced capacity and performance, making it a popular choice for high-power applications such as vaping devices, e-cigarettes, and handheld thermal imagers.


6. 18650 - Capacity Range: 1500mAh to 5000mAh

Widely regarded as the workhorse of lithium-ion batteries, the 18650 cell boasts exceptional capacity and versatility. It powers a diverse array of devices ranging from laptop batteries and power banks to electric bicycles and flashlights.


7. 16430 - Capacity Range: 800mAh to 2000mAh

The 16430 cell, with its elongated form factor, is tailored for devices requiring a slender yet powerful energy source. Applications include laser pointers, tactical flashlights, and handheld barcode scanners.


8. 18530 - Capacity Range: 1000mAh to 3000mAh

Similar to the 18500 but with a slightly shorter length, the 18530 cell offers comparable performance in a more compact package. It finds use in applications where space constraints are a concern, such as portable medical devices and electronic locks.


9. 26650 - Capacity Range: 2000mAh to 5000mAh

The 26650 cell stands out for its larger size and robust energy reserves, making it an ideal choice for high-capacity applications such as electric vehicles, solar energy storage systems, and power tool batteries.


Tabs: Enhancing Connectivity and Versatility

In addition to standard cylindrical cells, many manufacturers offer variants with tabs attached to the positive and negative terminals. These tabs simplify the process of soldering or connecting the batteries to circuitry, enhancing flexibility and ease of integration in custom electronics projects.


Applications Across Industries

From consumer electronics to industrial machinery, the versatility of 3.7-volt lithium-ion cylindrical cells extends across a myriad of industries:

Consumer Electronics: Smartphones, tablets, laptops, digital cameras
Medical Devices: Portable defibrillators, insulin pumps, wearable health monitors
Power Tools: Cordless drills, impact drivers, rotary tools
Renewable Energy: Solar-powered lighting systems, off-grid power solutions, portable solar chargers
Transportation: Electric bicycles, scooters, drones, electric vehicles

3.7-volt lithium-ion cylindrical cells represent a cornerstone of modern battery technology, offering a perfect blend of performance, reliability, and versatility.