18650 vs AA Batteries: What are the Differences?
18650 vs AA Batteries

18650 vs AA Batteries: What are the Differences?

Table of Contents

Batteries are a ubiquitous part of our modern lives, powering everything from small household gadgets to large industrial machinery. There are countless types of batteries available on the market, each with their own unique features and capabilities. Among the most common types are AA and 18650 batteries, which are widely used in a variety of devices, ranging from flashlights and remote controls to vape mods and power banks.

In this article, we’ll take a closer look at the similarities and differences between 18650 and AA batteries, and explore their strengths and weaknesses in different applications. Whether you’re a tech enthusiast looking to power your latest gadget or a curious consumer wondering which type of battery is right for your needs, this article will provide a comprehensive overview of the key differences between 18650 and AA batteries.

Differences Between 18650 and AA Batteries

Size and Shape

One of the most obvious differences between 18650 and AA batteries is their size and shape. AA batteries are cylindrical and measure about 50 mm in length and 14 mm in diameter, while 18650 batteries are slightly larger, measuring about 65 mm in length and 18 mm in diameter. As a result, 18650 batteries have a higher capacity and can store more energy.

Check also – 18650 vs 14500 Batteries: What are the Differences?


Capacity refers to the amount of energy that a battery can store, and it’s usually measured in milliampere-hours (mAh). 18650 batteries generally have a higher capacity than AA batteries, which means they can provide more power for longer periods of time. For example, a high-quality 18650 battery can have a capacity of up to 3500 mAh, while the most powerful AA batteries on the market only reach around 3000 mAh.


The voltage of a battery determines how much energy it can deliver at a given time. 18650 batteries typically have a higher voltage than AA batteries, which makes them better suited for high-powered devices that require more energy. For example, a single 18650 battery can deliver up to 4.2 volts, while AA batteries typically only provide 1.5 volts. However, it’s worth noting that some devices, particularly those designed for low power consumption, can run on either 18650 or AA batteries.


18650 batteries are almost always rechargeable, while AA batteries can be either rechargeable or disposable. Rechargeable AA batteries are commonly available, but they tend to have a lower capacity than 18650 batteries, so they may not be as suitable for high-powered devices. Additionally, 18650 batteries can be recharged many times without losing their capacity, while rechargeable AA batteries tend to degrade over time.


In general, 18650 batteries are more expensive than AA batteries. This is partly due to their larger capacity and higher voltage, but also because they are typically used in high-end devices such as flashlights and vape mods. However, the cost of both types of batteries can vary depending on the brand and quality.


In summary, 18650 and AA batteries have several similarities and differences. 18650 batteries are larger, have a higher capacity and voltage, are almost always rechargeable, and are generally more expensive than AA batteries. AA batteries, on the other hand, are smaller, less powerful, and can be either disposable or rechargeable. Ultimately, the choice between these two types of batteries will depend on the specific needs of the device you’re powering. If you need a lot of power for a long time, 18650 batteries are the better choice. If you need something smaller and less expensive, AA batteries may be the way to go.

More to explorer