14500 vs AA Battery, Can I use 14500 instead of AA?

There are some similarities between a 14500 battery and an AA battery, but they have distinctly different voltages due to their chemistries. 14500 cells may also have built-in PTC or other protection systems, which may increase their overall length slightly. In this blog post, we’ll explore the difference between these two types of batteries and whether or not it’s possible to switch them out. So sit back, relax, and let’s dive into the world of battery power!
14500 vs AA Battery, Can i use 14500 instead of AA?

What are 14500 battery?

14500 battery refers to a specific size of rechargeable lithium-ion batteries. The “14500” designation indicates their dimensions: 14mm in diameter and 50mm in length. These batteries are roughly the same size as standard AA batteries, but there are important distinctions between the two:
14500 vs AA Battery, Can i use 14500 instead of AA?

  1. Voltage: A standard 14500 lithium-ion battery typically has a voltage of 3.7V when fully charged, which is higher than the 1.5V of a standard alkaline AA battery. This means you can’t simply replace AA batteries with 14500 batteries in any device without making sure it’s compatible with the higher voltage. Doing so might damage the device.
  2. Capacity: 14500 batteries will typically have a lower capacity (measured in milliamp-hours or mAh) than AA alkaline batteries. This means that, depending on the application, a device might run for a shorter time on a 14500 battery than it would on an AA battery.
  3. Rechargeable: 14500 batteries are rechargeable, whereas standard AA alkaline batteries are not. However, there are AA-sized NiMH (Nickel-Metal Hydride) batteries that are also rechargeable.
  4. Chemistry: 14500 batteries use lithium-ion chemistry, whereas AA alkaline batteries use an alkaline chemistry. There are also other types of AA-sized batteries, like NiMH, which have different chemical compositions.

If you’re considering using 14500 batteries as a replacement for AA batteries in a device, make sure to check the device’s specifications and requirements first to ensure safety and proper operation.

What are AA battery?

AA batters is a standard size of cylindrical batteries that are commonly used in a variety of electronic devices. Here’s a brief overview:
14500 vs AA Battery, Can i use 14500 instead of AA?

  1. Physical Dimensions: AA batteries typically have a diameter of about 14.5 mm (0.57 inches) and a height of about 50.5 mm (1.99 inches).
  2. Voltage and Chemistry:
    • Alkaline AA: The most common type, with a voltage of 1.5V.
    • NiMH (Nickel-Metal Hydride) AA: Rechargeable and usually has a voltage of 1.2V. They come in various capacities, commonly ranging from 600mAh to 2800mAh or even more.
    • NiCd (Nickel-Cadmium) AA: These are older rechargeable batteries with a voltage of 1.2V. They’re less common now due to the memory effect and environmental concerns related to cadmium.
    • Lithium AA: Not to be confused with lithium-ion, these batteries offer a 1.5V output, like alkaline batteries, but with a longer lifespan. They are especially useful in cold climates and high-drain devices because of their performance characteristics.
  3. Usage: AA batteries are used in a wide variety of devices, including remote controls, flashlights, toys, digital cameras, and many other household items.
  4. Battery Life: The lifespan of an AA battery depends on its chemistry, its capacity (measured in milliamp-hours or mAh), the device in which it’s used, and the current draw of the device.
  5. Environmental Concerns: As with all batteries, there are environmental concerns associated with their production, usage, and disposal. It’s important to dispose of or recycle batteries properly.

When purchasing AA batteries, it’s important to consider the device’s requirements. For devices that are used intermittently or infrequently, traditional alkaline batteries might be sufficient. For high-drain devices or items used frequently, rechargeable NiMH batteries could offer better long-term value and performance. Always check the manufacturer’s recommendation for the most appropriate battery type for a specific device.

Comparing 14500 and AA Battery

14500 and AA batteries are both cylindrical, single-use batteries that operate on the same principle. The difference between them lies in their size, capacity, and voltage output.

  • Size: Both have a similar cylindrical shape; however, 14500s are about 45mm long, slightly shorter than the 50mm AA batteries.
  • Capacity: 14500 batteries range between 600-1000mAh, while AAs offer a capacity of 2000-3000mAh.
  • Voltage: A Li-ion 14500 outputs up to 3.7V, making it suitable for high-powered devices, whereas AAs provide around 1.5V.
  • Availability & Use: While AAs are more widespread and cost-effective for general purposes, 14500s, despite their special charger requirements and less commonality, excel in performance for certain tasks.14500 vs AA Battery, Can i use 14500 instead of AA?

Both types of batteries can be found in alkaline or rechargeable options depending on your needs, with some brands offering longer-lasting versions that boast higher capacities or lower self-discharge rates.

If you’re looking for portability and convenience over power output then AA may be your choice due to its wider availability compared to the less popular Li-ion-powered 14500 that come with better performance characteristics but require special chargers as well as being relatively expensive than AAs.

14500 vs AA Battery, Can i use 14500 instead of AA?

Can I use a 14500 battery instead of an AA battery?

No. Due to the voltage disparity between AA and 14500 batteries, it’s generally not advisable to interchange them. However, certain devices, like AA flashlights, are designed to accommodate both AA and 14500 batteries. For flashlights used sporadically, high-quality, low self-discharge AA batteries are preferable. Meanwhile, for those used regularly, 14500 batteries are recommended.

Can I charge a 14500 battery in AA battery charger?

Can I charge a 14500 battery in AA battery charger?

Of course No!
You should not charge a 14500 battery in a standard AA battery charger. The 14500 Li-Ion battery has a different voltage, chemistry, and specifications compared to the AA battery. Charging a 14500 battery in an AA charger that isn’t explicitly compatible can lead to reduced battery life, potential damage, and safety hazards such as overheating or venting. It’s crucial to use a charger specifically designed for lithium-ion cells or one that states it’s compatible with both NiMH AA and 14500 lithium-ion batteries to ensure safety and proper charging.

Who makes the best 14500 and AA battery?

Redway engineer team has succeeded to developing new 14500 and AA lithium batteries already. If you wannt to do the customized 14500 and AA lithium batteries, please contact with us for the scheme and quotation.


14500 and AA batteries, although similar in appearance, differ significantly in voltage and capacity. Using a 14500 battery as a substitute for an AA might damage devices or cause injury unless you’re sure of compatibility. Always consult manufacturer guidelines or experts before making a switch. Prioritize using the recommended battery type for safety and optimal device performance. Separately, Redway offers reliable Lithium Iron Phosphate Battery solutions, suitable for various applications from RVs to emergency lighting. They specialize in custom solutions, serving wholesale and B2B customers, and are recognized for quality and reliability in Europe.


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