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

AA vs AAA Batteries: What are the Differences?

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Batteries are an integral part of our daily lives. They power everything from small electronic devices to large industrial machinery. AA and AAA batteries are two of the most common types of batteries that are widely used in households and workplaces. They are used in a range of devices, including remote controls, flashlights, digital cameras, toys, and many more.

While these batteries may seem similar, they have some significant differences that can impact their performance and suitability for different devices. Understanding the differences between AA and AAA batteries can help consumers make informed decisions about which type of battery to use in their devices.

Differences Between AA and AAA Batteries

Size and Shape

The most obvious difference between AA and AAA batteries is their size and shape. AA batteries are longer and wider than AAA batteries. Specifically, AA batteries are about 50.5mm in length and 14.5mm in diameter, while AAA batteries are about 44.5mm in length and 10.5mm in diameter. This difference in size and shape means that AA batteries have more energy capacity than AAA batteries.

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Capacity and Power

The capacity of a battery refers to the amount of energy it can hold. AA batteries have a higher capacity than AAA batteries due to their larger size. AA batteries typically have a capacity of 2000 to 3000 milliampere hours (mAh), while AAA batteries have a capacity of 1000 to 1200 mAh. This means that AA batteries can last longer in high-drain devices like digital cameras, while AAA batteries are better suited for low-drain devices like remote controls.

Voltage AA and AAA

batteries have the same voltage of 1.5 volts. This means that they are interchangeable in most devices that use either battery size. However, it is important to note that some electronic devices require a specific type of battery, so consumers should always check the device’s manual before inserting a battery.


The cost of AA and AAA batteries varies depending on the brand and quantity purchased. In general, AAA batteries are cheaper than AA batteries. However, since AA batteries have a higher capacity, they may last longer in high-drain devices, making them a more cost-effective option in the long run.


Impact Both AA and AAA batteries can have a negative impact on the environment if not disposed of properly. They contain heavy metals like mercury, cadmium, and lead that can leach into soil and water sources. To reduce their impact, consumers should recycle batteries at designated drop-off locations or through mail-in programs.


In conclusion, AA and AAA batteries have their similarities and differences. AA batteries have a larger size, higher capacity, and longer lifespan, making them more suitable for high-drain devices. Meanwhile, AAA batteries are smaller, cheaper, and better suited for low-drain devices. Regardless of which type of battery you choose, it is important to dispose of them properly to minimize their impact on the environment.

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