The Humble AA Cell's Revival: Exploring the Pros and Cons of AAA Batteries

The humble AA cell may be slowly losing its relevance in a world dominated by rechargeable lithium-ion-based appliances, but my interest in the subject was reignited this year. In 2016, I embarked on a crazy journey to test 47 types of AA cells to determine just how much they varied in terms of capacity when tested under a constant-power load profile.

Fast forward to today, and I find myself pondering the pros and cons of AAA batteries. With rechargeable options available in both NiMH (1.2v) and Li-ion (3.7v), there's no shortage of choices for those looking for a reliable power source. But what are the benefits and drawbacks of using AAA batteries over other types, such as CR123A or 10440?

One major advantage of AAA batteries is their small size and portability. They're perfect for everyday carry lights, especially for those who value compactness above all else. However, they do have a lower energy density compared to larger batteries like CR123A, which means they may not be as bright or long-lasting.

On the other hand, rechargeable AAA batteries offer a cost-effective solution for frequent users. Eneloops are a popular choice among enthusiasts, offering reliable performance and a long lifespan. But for those who prioritize brightness over battery life, primary AAA batteries might be the way to go.

The 4-AAA battery setup is also worth considering, as it offers a compromise between size and energy density. The Romisen RC-K4, rated at 160 lumens, is one such example that uses this configuration. It's not the brightest light on the market, but it's compact and easy to use.

Ultimately, the choice between AAA batteries and other types comes down to personal preference and intended usage. For those who value portability above all else, a small AAA light might be the perfect solution. But for those who prioritize brightness or need a reliable power source for extended periods, CR123A or 10440 batteries might be a better option.

In conclusion, while AA cells may not be the most exciting topic, they still have their place in the world of battery technology. By understanding the pros and cons of AAA batteries, enthusiasts can make informed decisions about which type to use for their specific needs. Whether you're looking for a compact light or a reliable power source, AAA batteries offer a range of options that cater to different preferences and lifestyles.

4 aaa batteries