The LR44 and SR44 batteries are popular button/coin cell power sources, each with distinct features and uses. The LR44, also referred to as the IR44 battery, utilizes Alkaline Zinc Manganese chemistry, providing an economical and adaptable option for various electronic devices. On the other hand, the SR44 battery, which employs Silver Oxide chemistry, is known for its stable voltage output and is often favored in precision instruments such as watches and calculators. Although their chemistries differ, these batteries have similar dimensions and are commonly interchangeable in many devices. Knowing the differences between them can assist you in making a well-informed choice that suits your particular requirements.

LR44 Overview

The IR44 battery is a button cell powered by Alkaline Zinc Manganese chemistry. It generally operates at 1.5 volts, with a temperature range of 0°C to 60°C, ideally at 20°C. This battery can be used in various devices, including watches, motherboards, and several medical devices such as thermometers.

LR44 batteries are recognized for their cost-effectiveness and are commonly used in toys and various general applications. As alkaline batteries, they tend to dip below the 1.4V threshold fairly quickly. Their discharge profile is described as "sloping," indicating a gradual decrease in energy over time. Nevertheless, LR44 batteries can often be used interchangeably with SR44 batteries, particularly in devices that have flexible power needs.

SR44 Overview

The SR44 battery is a silver oxide button cell commonly found in many popular brand-name watches. It is also suitable for powering handheld calculators and various small devices. Other batteries, such as LR44, AG13, SG13, and 357, serve as direct equivalents to the SR44. This design is among the largest and most frequently used watch batteries, featuring a case size of 11.6mm in diameter and 5.4mm in thickness. The output voltage is 1.55V, with a typical capacity ranging from 170 to 200mAh.

In contrast, SR44 batteries utilize silver oxide technology to deliver a stable voltage of 1.55V during the majority of their discharge cycle. This feature makes them ideal for precision electronic devices, particularly in marine settings. SR44 batteries provide more reliable and consistent performance than LR44 batteries, making them a preferred choice for certain critical applications.

LR44 VS SR44: Comparison Table

LR vs SR vs MR: What Are The Main Differences?

LR Series Batteries:

Cost-effective and versatile, LR series batteries are widely used in devices where budget is a key factor. They provide a nominal voltage of 1.5V and a capacity ranging from 120-150mAh.

SR Series Batteries:

Designed for applications that require stable and slightly higher voltages, SR series batteries feature a nominal voltage of 1.55V and improved capacity, making them common in watches and other electronic devices.

MR Series Batteries:

Traditionally used in specific devices like pocket computers, MR series batteries typically operate around 1.4V, with varying capacities that necessitate careful consideration of device compatibility.

Choosing the Right Battery:

Opt for LR batteries for cost efficiency, SR batteries for stable higher voltage requirements, and MR batteries for devices with historical specifications. Always take into account device needs, voltage sensitivity, possible recalibration, and follow manufacturer guidelines for the best battery choice.

LR44 VS SR44: Equivalents

LR44:

The LR44 battery, also recognized by equivalents such as A76, AG13, L1154, LR1154, and 157, offers a versatile range of replacements for this size. Although these batteries share the same form factor, it’s important to remember that the LR44 is chemically different from silver oxide button cells, including SR44, SR44SW, 303, and 357.

While it’s common for batteries to fit into devices designed for other equivalents, their chemical differences should not be overlooked. Using the appropriate battery type for your device is crucial to avoid over- or under-discharging. Always consider the size and voltage to prevent potential damage.

SR44:

The SR44 battery, known by various names such as CR44, 357, SR44W, AG13, G13, A76, A-76, PX76, 675, 1166a, LR44H, V13GA, GP76A, L1154, RW82B, EPX76, SR44SW, 303, S303, S357, SP303, and SR44SW, presents an extensive list of equivalents. These batteries are interchangeable in many devices, providing flexibility in their applications.

LR44 VS SR44: Are LR44 and SR44 Interchangeable?

The LR44 and SR44 batteries share the same physical dimensions. However, the SR version has a slightly higher terminal voltage (1.55V compared to 1.5V) and a greater capacity. While many devices are designed for LR44 batteries, some may be compatible with SR44, but it's difficult to confirm compatibility, and testing it could be risky.

Though the LR44 battery is the same size, it differs in chemistry from silver oxide button cells like SR44, SR44SW, 303, and 357. While batteries can often fit into each other’s devices, it’s crucial to select the recommended battery type for your device to prevent over- or under-discharging. Always verify the size and voltage of the battery required to avoid any potential damage to your device.

Conclusion

In summary, both LR44 and SR44 batteries are vital for powering a wide array of electronic devices. The LR44 is known for its cost-effectiveness and versatility, while the SR44 is recognized for its stable voltage output, making it particularly suitable for precision applications. Although these batteries can be interchangeable in some devices, it’s important to take into account factors such as chemistry and discharge profiles for the best performance. Ultimately, a clear understanding of your electronic devices’ specific requirements will help you decide between LR44 and SR44, ensuring reliable and efficient power solutions.