10440 Battery: Features, Applications & Alternatives

30 October 2025
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What is a 10440 Battery?

The 10440 battery is a rechargeable lithium battery widely utilized in mini electronic devices. It's part of the 10-series of batteries, with 10 being the measurement that the battery is (10mm), while 440 represents the length of release for it (44mm). These batteries function in much the same way as their AAA and AA counterparts, except they tend to be smaller and more powerful. As such, they make ideal sources of electric energy in tight spaces where space may be an issue and devices require an encased source of power.

 

10440 Battery

 

Key Features and Specifications

Most notably is its voltage, which ranges between 3.7V and 4.2V at full charge compared to 1.5V offered by traditional AAA and AA batteries. The higher voltage allows the 10440 to deliver higher performance when used in small devices. The 10440 is a tiny device, having a size of 10 millimeters and an overall length of just 44mm and can be incorporated into tiny and compact devices. Its capacity ranges from 350mAh to 600mAh, depending on the dimensions, and it offers a good run time. Although it isn't as powerful an energy source compared to bigger batteries, such as the 18650. it's portable and can thus be utilized in instances where weight and space are a concern.

 

Specification

10440 Battery

Voltage

3.7V - 4.2V

Size (Diameter)

10mm

Size (Length)

44mm

Capacity

350mAh - 600mAh

Type

Li-ion (Rechargeable)

Common Use

Small electronic devices (e.g., flashlights, key fobs)

 

Common Applications

This battery is frequently used in flashlights due to its size and its ability to provide more power. Many miniature LED flashlights make use of this type of battery, which provides powerful and bright illumination. These flashlights provide constant lighting, and while at the same time they are small in size, and can be maintained and stored in pockets, making them practical to carry for everyday activities or in the event of an emergency. The 10440 comes with a large energy capacity and has the ability to give the flashlight a lengthy duration of use without having to recharge it. This is a benefit over other batteries that are small batteries.

 

Electronic Gadgets and Personal Devices

The 10440 battery can be used in other types of equipment, like tiny cameras, portable cameras that are portable and toys. It's extremely voltage-sensitive and compact in size, which makes it a great source of power in handheld electronic devices that are handheld, that require a large amount of power, but at the same it is reliable and effective in small areas is essential. Additionally, the devices take advantage of the fact that the 10440 battery is capable of providing a steady voltage that can be utilized by other functions, for example, flash photography, remote sensors or. The number of such devices is also quite high, and of this number, the majority of devices are designed to be portable.

 

Equivalent Batteries to the 10440 Battery

14500 Battery

The 14500 is a lithium-ion (rechargeable) battery; however, its capacity is greater. The 14500 typically has 600mAh-1000mAh of capacity; however, it's an excellent option with the 10440.

 

CR123A Battery

Size Comparatively Dimensions: The lithium battery on the outside isn't rechargeable. Size is 17mm by 34mm.

Aspects: CR123A is larger (approximately 1500mAh). It is also 3V. It is extensively used in security cameras as well as high-performance flashlights, where large batteries are required; however, it's not capable of charging like a 10440.

 

16340 Battery

Size Comparative: This battery displays an increase of 8mm in its diameter, and the gap is 18mm.

Specifications: Rechargeable battery 16340 Li generally come with a capacity of energy that ranges from 3.7 Volts to 500mAh, and even up to 800mAh. This battery is perfect for large flashlights and electronic devices with power requirements that demand a lot of power.

 

RCR123A Battery

Clash of Sizes: The dimensions and form of this rechargeable lithium RCR123A model are comparable to other RCR123A batteries; however, lithium is utilized as a fuel source.

The RCR123A's batteries operate on 3.7V instead of the conventional three-volt battery. They also come with capacities of 600mAh, which is equivalent to a 10440 battery. They're often utilized in devices requiring high amounts of power, such as flashlights with powerful output; additionally, RCR123A batteries are often cheaper and more environmentally-friendly alternatives to their competitors.

 

AA Rechargeable Batteries

Dimensional Comparisons: The dimension of the AA battery is bigger than 10440 batteries since the latter measures 14.5mm in diameter and 50mm long.

Specifications: The rechargeable AA batteries can be replaced with 10440. This battery is available in either 1.2V as well as 3.7V in different versions. It is suitable for devices that require a longer run time. The size of the battery is greater, so they're better suited for larger devices.

 

Looking at the Alternative Battery to Use

The elements to be considered when selecting these batteries are the dimensions of the devices and the voltage required, capacity needed. The battery's rechargeability, or not, like 10440s, is ideal for small devices in terms of size and rechargeability being the two main features.

 

Are 10440 batteries equivalent to AAA?

There's a distinction between the two batteries; they're two batteries that are distinct. Although the 10440 batteries seem similar however the distinctions are as follows:

 

10440 VS AAA

 

Dimensions and Size

The battery is significantly shorter than AAA batteries that are typical. AAA batteries can measure 10.5mm. The most widely utilized dimension of the most commonly used diameter is 10.5mm. The overall length could be 44.5mm. So, the majority of 10440-compliant devices do not have AAA batteries.

 

Voltage

Lithium-ion rechargeable batteries have a nominal power of 3.7 V, as compared to AAA alkaline batteries or rechargeable NiMH batteries. They are defined by 1.5 V (alkaline) and 1.2 V (rechargeable NiMH) in both cases. Because of the higher voltage rating, it cannot be used without the ability to modify the devices that handle AAA batteries.

 

Rechargeability

The 10440 battery has the ability to be recharged because of lithium-ion batteries. The AAA battery isn't charged (alkaline) or is rechargeable (NiMH). 10440 batteries are, however, larger in capacity than other batteries.

 

Applications

AAA cells can be utilized in a wide range of electronic home gadgets, like flashlights, remote controls and even toys. 10440 cells are more likely to be found in smaller devices, where more power is required in a smaller area, such as flashlights or key fobs.

 

Conclusion

The 10440 battery high-voltage rechargeable lithium-ion batteries are available in a smaller dimension, which is ideal for electronic-scaled devices. Its compact size and powerful output are ideal for devices when space is a must for the flashlights of key fobs and other devices needing power. Although there are alternative batteries available in the market, including 14500. CR123A, and 16340 that have different sizes and capacities to satisfy the needs of the market when compared to the competition, like 14500. CR123A and 16340 might offer higher efficiency, and 10440 is the preferred choice in situations where a flood of performance and size are required.

 

FAQs

What are the gadgets that require 10440 batteries?

Electronic components that are used in small-sized equipment, like flashlights, key fobs and other accessories, cameras, portable meters and key fobs, which require a lot of power, yet require only a small physical space. They usually consist of microchips packed with power.

 

Can AAA and 10440 batteries be used interchangeably?

There's no connection between AAA cells or 10440. However, their dimensions could be comparable due to their greater output voltage and capacity to recharge. However, they aren't fully compatible with every device that utilizes AAA cells.

 

How do I expect my battery 10440 to last?

The lifespan of 10440 batteries is contingent on their capacity (typically between 350mAh and 600mAh) and also the power they use. It generally will last for several hours in devices such as flashlights to require an energy source.

 

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