LR44 vs 357: Are LR44 and 357 Batteries the Same

In button cell batteries, the LR44 and 357 have emerged as popular choices. Are LR44 and 357 batteries essentially the same, or do their specifications and applications reveal nuances? This article seeks to unravel the similarities and differences between LR44 and 357 batteries, shedding light on their chemistry, voltage characteristics, applications, and more. 

 

Overview of LR44

The LR44 battery, an alkaline button cell, stands out for its versatile application in a diverse range of devices. With a nominal voltage of 1.5 volts and dimensions measuring 5.4mm in diameter and 11.6mm in height, it offers a relatively high energy density. This battery type is commonly found in small electronic gadgets, watches, calculators, and medical devices. Users should be mindful of its voltage decay characteristics, as the output steadily drops during discharge, and some devices may exhibit reliability concerns if the voltage falls below a specific threshold. Despite its widespread use, the LR44's taller height may impact its fit in certain battery compartments, making compatibility considerations important.

 

Specifications

 

LR44 Battery Equivalent parts

 

AG13: AG13 is a common equivalent for LR44. It has the same size and voltage, making it a suitable replacement.

A76: A76 is another designation that is equivalent to LR44. It shares the same size and voltage specifications.

357: The 357 battery, also known as SR44, is often considered interchangeable with LR44 due to similar size and voltage.

SR44: SR44 is another designation that is equivalent to LR44. It has the same size and voltage and is often used interchangeably.

G13: G13 is another alternative designation for LR44. It shares the same size and voltage characteristics.

PX76A: PX76A is yet another equivalent for LR44, often used in photography equipment.

 

Overview of 357

The 357 battery, classified as a silver oxide cell, is distinguished by its reliable performance in precision devices. With a nominal voltage of 1.55 volts and a capacity typically around 150mAh, the 357 exhibits a stable and consistent voltage output throughout its lifespan, making it an ideal power source for watches, calculators, toys, and various medical instruments. Notable for its longer lifespan, ranging from 30% to 100% more than an LR44 battery, the 357 provides extended operational life and reduces the frequency of battery replacements. Its compact dimensions, measuring 11.6mm in diameter and 5.4mm in height, contribute to its compatibility in various battery compartments. 

 

Specifications

 

357 Battery Equivalent Parts

 

SR44: SR44 is one of the most common equivalents for the 357 battery. It shares the same size and voltage specifications.

AG13: AG13 is another equivalent for the 357 battery. Like SR44, it has the same size and voltage and is often used interchangeably.

A76: A76 is a designation that is equivalent to 357. It shares the same size and voltage characteristics.

SG13: SG13 is another alternative designation for the 357 battery. It has the same size and voltage.

PX76A: PX76A is yet another equivalent for the 357 battery, often used in photography equipment.

 

Button Battery: LR44 vs 357

 

 

LR44 vs. 357 Batteries Catalog:

Chemistry Differences
Voltage Differences
Voltage Decay Differences
Lifespan Differences
Size Differences
Cost Differences
Conclusion (Comparison Table)

Chemistry Differences: LR44 (Alkaline) vs. 357 (Silver Oxide)

• Alkaline LR44 Battery

LR44 batteries use alkaline chemistry. Alkaline batteries typically contain zinc and manganese dioxide as the primary components.

Performance Characteristics:

Alkaline chemistry provides a relatively high energy density.

Voltage output starts to drop steadily as the battery discharges.

Suitable for a wide range of applications with varying power demands.

Common Applications: 

LR44 batteries are commonly used in devices such as small electronic gadgets, watches, calculators, and medical devices.

• Silver-Oxide 357 Battery

357 batteries utilize silver oxide chemistry. Silver oxide batteries contain silver oxide as the positive electrode, zinc as the negative electrode, and an alkaline electrolyte.

Performance Characteristics:

Silver oxide chemistry offers a stable and relatively constant voltage output throughout the majority of the battery's life.

Higher energy density compared to alkaline batteries, making them suitable for devices with precision requirements.

Typically used in applications demanding a consistent and reliable power source, such as watches and medical instruments.

Common Applications: 

357 batteries are commonly found in watches, calculators, toys, and various medical devices.

• Considerations for Choosing Between LR44 and 357:

Voltage Stability: The silver oxide chemistry of 357 batteries provides a more stable voltage output, making them preferable for precision devices.

Energy Density: Silver oxide batteries often have a higher energy density, allowing them to power devices with higher energy demands.

 

Voltage: LR44 vs. 357 Batteries

LR44 is rated at 1.5v, while 357 is rated at 1.55v.

1. Device Compatibility:

LR44 Batteries:

Suitable for devices that can operate within a 1.5-volt power supply.

Widely used in various electronic gadgets, watches, calculators, and medical devices.

357 Batteries:

Ideal for devices that require a slightly higher voltage of 1.55 volts.

Commonly found in precision instruments like watches, calculators, and medical devices.

2. Voltage Stability:

LR44 Batteries:

Output voltage starts to drop steadily as the battery discharges.

May be suitable for devices where a gradual decrease in voltage is acceptable.

357 Batteries:

Silver oxide chemistry provides a stable and relatively constant voltage output throughout most of the battery's life.

Beneficial for precision devices that require a consistent power supply.

3. Sensitivity to Voltage:

LR44 Batteries:

Some devices may experience reliability concerns if the battery voltage falls below a certain threshold (e.g., 1.2 volts).

357 Batteries:

Preferred for applications with specific voltage requirements, such as watches, where constant and precise voltage is crucial for accurate timekeeping.

4. Energy Density:

LR44 Batteries:

Provide a relatively high energy density at 1.5 volts, suitable for various applications.

357 Batteries:

Higher rated voltage (1.55 volts) contributes to a potentially higher energy density, making them suitable for devices with higher energy demands.

Understanding the voltage differences between LR44 and 357 batteries is essential for selecting the appropriate battery for specific devices. The slightly higher voltage of the 357 battery, along with its stable output, makes it particularly well-suited for precision instruments and applications with specific voltage requirements. It's crucial to consider the voltage sensitivity of the device and choose the battery accordingly for optimal performance.

 

Voltage Decay

The silver oxide 357 maintains a more constant voltage until the end of its life at 1.2v, while the alkaline LR44 drops to 1.0v.

1. Alkaline LR44 Battery:

Voltage Decay Characteristics:

As the LR44 battery discharges, the voltage output exhibits a gradual and more linear decline.

The voltage may drop to 1.0 volts or below as the battery approaches the end of its life.

Implications:

Devices powered by LR44 batteries may experience a relatively steady decrease in voltage, potentially impacting performance in applications sensitive to voltage fluctuations.

Some devices may have a cutoff threshold, below which reliability concerns arise.

2. Silver Oxide 357 Battery:

Voltage Decay Characteristics:

The silver oxide chemistry in 357 batteries allows for a more constant voltage output throughout the majority of the battery's life.

The voltage remains stable until the end, at which point it may drop to 1.2 volts.

Implications:

Devices powered by 357 batteries benefit from a more stable and consistent voltage supply.

Precision instruments, such as watches, calculators, and medical devices, can maintain accurate functionality until the battery is near depletion.

Considerations and Applications:

• Precision Devices

LR44 Batteries:

Suitable for devices where a gradual decline in voltage is acceptable.

May be used in applications with lower precision requirements.

357 Batteries:

Ideal for precision instruments that demand a stable and constant voltage supply.

Commonly used in watches and medical devices where accuracy is crucial.

• Device Reliability

LR44 Batteries:

Reliability concerns may arise in devices that are sensitive to voltage drops below a certain threshold, such as 1.0 volts.

357 Batteries:

The more constant voltage output contributes to consistent device performance, enhancing reliability.

• End-of-Life Voltage:

LR44 Batteries:

Voltage may drop to 1.0 volts or lower, indicating the end of its usable life.

357 Batteries:

Maintains a stable voltage until the end, with a drop to 1.2 volts, providing longer and more predictable functionality.

Understanding the voltage decay characteristics is crucial for selecting the appropriate battery for specific applications, especially those requiring precision and reliability. The choice between LR44 and 357 batteries should align with the voltage requirements and sensitivity of the devices they power.

 

Lifespan: LR44 vs. 357 Batteries

1. Alkaline LR44 Battery:

Lifespan Characteristics:

The lifespan of LR44 batteries is influenced by factors such as discharge rate, usage patterns, and the specific requirements of the devices they power.

Average nominal capacity in the range of 110-130 mAh.

Implications:

Suitable for a variety of applications with moderate energy demands.

Performance may vary based on usage and device characteristics.

2. Silver Oxide 357 Battery:

Lifespan Characteristics:

The silver oxide chemistry in 357 batteries often provides a longer lifespan compared to LR44 batteries.

Higher nominal capacity, typically in the range of 150-200 mAh or even more, depending on discharge currents.

Implications:

Suitable for applications with higher energy demands and those requiring a more extended operational life.

Preferred for precision devices where a stable and reliable power source is crucial.

Percentage Difference in Lifespan:

The statement "357 typically lasts 30% to 100% longer than the LR44" implies a significant advantage in favor of the 357 battery.

Considerations and Applications:

• High Energy Demand Devices:

LR44 Batteries:

Well-suited for devices with moderate energy demands.

357 Batteries:

Preferred for devices with higher energy demands due to their higher nominal capacity.

• Precision Instruments:

LR44 Batteries:

Adequate for applications with lower precision requirements.

357 Batteries:

Ideal for precision instruments such as watches and medical devices where a longer lifespan and stable voltage are critical.

• Impact on Frequency of Battery Replacement:

LR44 Batteries:

May require more frequent replacements in devices with higher energy demands.

357 Batteries:

Longer lifespan reduces the frequency of battery replacements, providing convenience and potentially reducing long-term costs.

• Shelf Life

LR44 Batteries:

Average shelf life of around 3 years, with some newer versions offering extended shelf life (4-5 years).

357 Batteries:

Standard 357 models often have a 5-year shelf life, showcasing their longevity on the shelf.

 

Size: LR44 (Alkaline) vs. 357 (Silver Oxide) Batteries

1. Alkaline LR44 Battery:

Size Characteristics:

The LR44 battery typically has a specific size, commonly measured as 5.4mm in diameter and 11.6mm in height.

Its height is a defining factor, and it tends to be relatively taller compared to some other button cell batteries.

Implications:

The taller height of LR44 batteries may impact their fit in certain battery compartments, especially those designed for shorter batteries.

2. Silver Oxide 357 Battery:

Size Characteristics:

The 357 battery shares the same standard size dimensions, often measured as 5.4mm in diameter and 9.5mm to 9.6mm in height.

Its height is slightly shorter than that of the LR44 battery.

Implications:

The slightly shorter height of the 357 battery makes it more suitable for battery compartments with limited vertical space.

Considerations and Applications:

• Device Compatibility:

LR44 Batteries:

May face challenges fitting into battery compartments designed for shorter batteries.

Compatibility depends on the specific design of the device and its battery compartment.

357 Batteries:

More likely to fit comfortably in a variety of battery compartments due to its slightly shorter height.

• Compact Devices:

LR44 Batteries:

May pose challenges in ultra-compact devices with tightly designed battery compartments.

Taller height may limit its use in devices where space is a critical factor.

357 Batteries:

Well-suited for compact devices that require a button cell with standard dimensions.

• Watch Batteries:

LR44 Batteries:

Compatibility may vary for watch battery compartments, depending on the specific watch design.

357 Batteries:

Often a preferred choice for watches and other precision instruments due to its standard size and slightly shorter height.

• Impact on Consumer Convenience:

LR44 Batteries:

Consumers may need to be mindful of the height difference when replacing batteries, ensuring a proper fit in the device.

357 Batteries:

Generally offers more flexibility in terms of fitting into various battery compartments, contributing to consumer convenience.

Overall Compatibility:

Both LR44 and 357 batteries share the same diameter, making them physically compatible in many applications. However, the height difference is a critical factor in specific devices and should be considered when choosing between the two.

 

Cost

The cost consideration for both LR44 and 357 batteries highlights that they are not as economically advantageous as certain alternative battery types.

LR44 batteries, while offering good cost performance, are not as cost-effective when compared to some other battery types. Batteries like zinc carbon and certain silver oxide alternatives may provide a more budget-friendly option.

Similarly, 357 batteries also face the challenge of not being as cost-effective when compared to certain battery types. This includes zinc carbon batteries and specific silver oxide alternatives, which may be more economical choices for users seeking a balance between performance and cost.

 

Conclusion:

 

Characteristic	LR44 (Alkaline)	357 (Silver Oxide)
Chemistry	Alkaline	Silver Oxide
Voltage	1.5V	1.55V
Rechargeable	Typically non-rechargeable	Typically non-rechargeable
Capacity	Generally lower capacity	Higher capacity (often 30% to 100% longer lifespan)
Voltage Stability	Voltage drops steadily as it discharges	Relatively constant voltage output
Lifespan	Average lifespan with moderate energy demands	Longer lifespan, suitable for higher energy demands
Size	5.4mm diameter, 11.6mm height (taller)	5.4mm diameter, 9.5mm to 9.6mm height (shorter)
Common Applications	Various electronic gadgets, watches, calculators	Watches, calculators, toys, medical devices
Cost	Generally less expensive than 357	Generally more expensive than LR44

 

Disadvantages of LR44 and 357

Disadvantages	LR44	357
Rechargeability	Not rechargeable	Not rechargeable
Capacity	Lower capacity compared to similar batteries	Capacity loss over time
Voltage	1.5V	1.55V
Heat Sensitivity	-	More sensitive to heat than alkaline batteries
Cost	Costly compared to some other batteries	Costly compared to some other batteries

 

LR44 vs 357: Similarities

Size: LR44 and 357 batteries share identical external dimensions (5.4mm x 11.6mm).

Voltage and Size Compatibility: Despite differences, they are often considered interchangeable in some devices due to their close voltage and size.

Manufacturer Naming: Manufacturers often use different names for the same cell (LR1154, AG13, LR44, 357, A76), causing potential confusion for consumers.

External Dimensions and Voltage: The external dimensions and voltage are the same, making them physically compatible in many cases.

Device Compatibility: In devices specifying LR44/A76 cells, using 357s may offer longer useful life due to their higher capacity, but this depends on the specific requirements of the device.

 

Can a 357 or 303 Button Battery Safely Replace an LR44?

 

The interchangeability of button batteries like LR44, 357, and 303 depends on various factors, including size, voltage, and application requirements. In some cases, these batteries may be considered equivalent, but it's essential to understand the nuances.

• Size Compatibility

LR44, 357, and 303 batteries often share the same physical dimensions, making them interchangeable in devices that accommodate these sizes.

• Voltage Differences

LR44 is typically rated at 1.5 volts, while 357 and 303 batteries are often rated at 1.55 volts. Although the voltage difference is small, it could impact the performance of certain devices, especially those sensitive to voltage variations.

• Chemistry Variations

LR44 is an alkaline battery, while 357 and 303 are often silver oxide batteries. The chemistry difference may affect the batteries' performance characteristics, such as discharge rate and overall lifespan.

• Application Considerations

For low-drain applications, silver oxide batteries like 357 and 303 may provide longer life compared to LR44, which is more suitable for high-drain applications.

While Amazon may list LR44, 357, and 303 as equivalent, it's important to consider that general equivalency does not guarantee identical performance in all devices. Manufacturer recommendations should still be prioritized.

 

SR44 vs 357

 

Characteristic	SR44	357
Chemistry	Silver-oxide	Silver-oxide
Composition	Contains silver, zinc, silver oxide	Contains silver, zinc, silver oxide
Voltage	1.55V	1.55V
Rechargeable	Typically non-rechargeable	Typically non-rechargeable
Capacity	May have higher capacity	Varies, but often comparable to SR44
Common Applications	Watches, cameras, electronics	Watches, cameras, electronics
Cost	Often more expensive	Generally less expensive compared to SR44

 

AG13 Battery vs 357

Characteristic	AG13	357
Other Names	LR44, A76	SR44, SR1154
Chemistry	Alkaline	Silver-oxide
Voltage	1.5V	1.55V
Rechargeable	Typically non-rechargeable	Typically non-rechargeable
Common Applications	Watches, calculators, electronics	Watches, cameras, electronics
Cost	Generally less expensive	Varies, but often more expensive than AG13

 

SR44 vs LR44

 

Characteristic	SR44	LR44
Chemistry	Silver-oxide	Alkaline
Composition	Contains silver, zinc, silver oxide	Contains zinc, manganese dioxide
Voltage	1.55V	1.5V
Rechargeable	Typically non-rechargeable	Typically non-rechargeable
Capacity	May have higher capacity	Generally lower capacity
Common Applications	Watches, cameras, electronics	Watches, calculators, electronics
Cost	Often more expensive	Generally less expensive

 

Final Words

While these button cells share commonalities in terms of size and external dimensions, their internal chemistry and performance characteristics set them apart. LR44, with its alkaline composition, caters to a range of devices with moderate energy demands, offering stable discharge and cost-effective performance. On the other hand, the 357, powered by silver oxide chemistry, stands out for its higher nominal voltage, longer lifespan, and suitability for precision instruments. 

 

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