You can substitute a 399 Battery, also known as SR927W, with equivalent batteries like SR57, SR927, LR927, GP399, and AG7. Check your watch model for compatibility. Product Code: 399BAT. EAN: 813282029276.
Another option is the LR927 battery. This alkaline variant provides the same power output but may have a shorter lifespan compared to silver oxide alternatives. When selecting a battery, check the specifications to ensure compatibility with your device.
If you are unsure which battery to choose, consult your device’s manual or a battery retailer. They can help you identify the best substitutes without causing damage to your watch.
After understanding the alternatives for a 399 watch battery, it is essential to consider how to replace the battery. Properly replacing the battery can extend the life of your watch and ensure accurate timekeeping. Next, we will explore the steps involved in replacing a watch battery safely and effectively.
What is a 399 Watch Battery and Its Specifications?
The 399 watch battery is a small, round, silver-oxide battery commonly used in watches and other electronic devices. It is also referred to as SR927W, featuring a nominal voltage of 1.55 volts and dimensions of approximately 9.5 mm in diameter and 2.7 mm in height.
According to the International Electrotechnical Commission (IEC), the 399 watch battery falls under their designations as part of the larger family of silver-oxide batteries, known for their stability and longevity. This battery type is particularly favored in the watch industry due to its reliable power output.
The 399 watch battery’s specifications include a high energy density and a consistent discharge voltage. These batteries are known for their relatively long shelf life, typically ranging from three to five years. Additionally, they can operate effectively in a wide temperature range.
The Battery University describes battery efficiency as a critical factor. It indicates a typical discharge curve for silver-oxide batteries, maintaining excellent performance without significant voltage drop during use.
Factors influencing battery performance include temperature extremes, humidity levels, and usage frequency. Improper disposal of these batteries can also lead to environmental damage, as they contain toxic metals.
Statistics from Research and Markets report a growth in the global watch battery market, projecting an increase due to high demand for precision timekeeping in consumer electronics.
The impact of using reliable batteries like the 399 extends to sustainability in manufacturing and consumer satisfaction, influencing product longevity and environmental policies.
In terms of recommendations, organizations like the International Watch and Clock Manufacturers’ Association suggest promoting battery recycling programs and enhancing consumer awareness about proper battery disposal.
Strategies to mitigate negative impacts include using environmentally friendly battery options and implementing recycling initiatives at retail points to handle used batteries responsibly.
What Are the Common Uses for a 399 Watch Battery?
The common uses for a 399 watch battery include powering various types of small electronic devices. These devices are commonly found in everyday life.
- Wristwatches
- Calculators
- Remote controls for cars and garage doors
- LED lights
- Key fobs for vehicles
- Medical devices (e.g., glucose meters)
The versatility of the 399 watch battery makes it useful in numerous applications, though the specific use may vary by device type.
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Wristwatches: The 399 watch battery serves as the primary power source for many quartz wristwatches. These watches rely on electrical energy to keep accurate time. According to a report by the International Watch Company (IWC), quartz watches are popular due to their reliability and low maintenance, with batteries needing replacement roughly every 1-2 years depending on usage.
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Calculators: The 399 battery powers scientific and basic calculators. These devices require minimal energy to function, making a small battery like the 399 ideal. Studies indicate that calculators benefit from long-lasting batteries, enhancing user experience, especially in academic settings.
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Remote Controls for Cars and Garage Doors: Many keyless entry systems for vehicles and garage doors use the 399 battery. This ensures convenience for users who prefer wireless operation. According to industry analysis by Electronics Weekly, remote controls often demand consistent energy output, which makes the 399 battery a suitable choice.
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LED Lights: Certain LED lights, especially those designed for decorative or portable use, utilize 399 batteries. These lights are favored due to their energy efficiency and light output. Research published by the Department of Energy in 2021 emphasizes LED technology’s energy-saving attributes, making them popular among consumers.
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Key Fobs for Vehicles: Key fobs designed for modern vehicles often rely on 399 batteries for their proximity functions and remote start features. This enhances vehicle security and convenience. A study by Automotive News noted the increasing reliance on electronic components in vehicles, which fuels the demand for small batteries.
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Medical Devices (e.g., Glucose Meters): Certain medical devices, such as glucose meters used by diabetics, often use 399 batteries. These devices require reliable power to ensure accurate readings. Research conducted by the American Diabetes Association highlights the importance of maintaining battery life in medical devices to support patient health.
The 399 watch battery’s widespread usability across various devices underscores its importance in both mundane and critical applications.
Which Batteries Can I Substitute for a 399 Battery?
You can substitute a 399 battery with the following battery types:
- 395 battery
- 394 battery
- SR726SW battery
- SR726 battery
A variety of battery types can effectively replace a 399 battery, presenting different characteristics and compatibility perspectives.
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395 Battery: The 395 battery can be used in place of a 399 battery. It shares similar voltage and physical dimensions.
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394 Battery: The 394 battery is also a compatible alternative. It has comparable specifications, making it a feasible choice.
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SR726SW Battery: The SR726SW battery can serve as a substitute for the 399 battery. This silver oxide option provides consistent voltage and reliability.
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SR726 Battery: The SR726 battery is another alternative. It offers a similar design and capacity to the 399, supporting compatibility.
When considering substitutions for a 399 battery, it is important to evaluate the specifications and performance of alternatives available on the market.
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395 Battery: The 395 battery is a common replacement for the 399. It features a voltage of 1.55 volts and is typically used in watches and small electronics. This battery provides a similar lifespan, typically lasting 2-3 years under normal usage. Users report satisfaction with the performance of the 395 as a replacement.
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394 Battery: The 394 battery closely resembles the 399 battery’s characteristics. It also operates at 1.55 volts and can be used in similar devices. Its compact size and efficiency make it a preferred choice among consumers looking for reliability in watch batteries.
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SR726SW Battery: The SR726SW battery offers a silver oxide chemistry, which is advantageous for its stable voltage and longer shelf life. This battery maintains consistent performance for various months, often exceeding the lifespan of alkaline counterparts. Its compatibility with devices requiring 399 batteries is well-documented in consumer reviews.
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SR726 Battery: The SR726 battery shares dimensions and performance traits with the 399. It is also a silver oxide battery, which ensures a steady output and durability. Many users favor the SR726 for high-drain devices due to its consistent discharge profile over time.
When selecting a battery substitute, ensure to confirm that it fits your device’s specific requirements.
What Are the Most Compatible Alternatives to a 399 Battery?
The most compatible alternatives to a 399 battery include the 392, 393, and SR927SW batteries.
- 392 Battery
- 393 Battery
- SR927SW Battery
The 392 battery is often used in watches, toys, and calculators. The 393 battery serves similar devices but offers a slightly higher discharge rate. The SR927SW battery typically provides longer life in electronic devices but may not be interchangeable with all applications due to its chemistry. Understanding these alternatives helps users select the right battery based on compatibility and performance requirements.
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392 Battery:
The 392 battery is a silver oxide battery known for its reliability in powering small electronic devices. This battery type is commonly used in wristwatches, remote controls, and medical devices. The dimensions of the 392 battery are approximately 9.5 mm in diameter and 2.6 mm in height. It typically has a voltage of 1.55 volts. Using 392 batteries provides a stable power source, ensuring the devices operate effectively and efficiently. -
393 Battery:
The 393 battery shares design characteristics with the 392 but differs in performance metrics. It usually features a higher discharge rate, allowing it to power devices that require a consistent and strong energy output. With dimensions similar to the 392, the 393 is also fitted into devices like watches and car remotes. While both batteries can often be used interchangeably, the 393 may enhance performance in high-drain devices like digital watches and high-tech gadgets. -
SR927SW Battery:
The SR927SW battery is another silver oxide option that provides longer life compared to standard alkaline batteries. This battery is often used in watches and electronic devices requiring longer battery life with stable voltage output. Its capacity typically ranges from 30 to 45 mAh, which allows for extended usage before replacement. Many users report improved performance of devices employing SR927SW batteries, particularly in watches that benefit from consistent power.
What Are the Key Differences Between a 399 Battery and Its Substitutes?
The key differences between a 399 battery and its substitutes primarily lie in size, voltage, chemistry, and application.
- Size: 399 batteries measure 11.6mm in diameter and 5.4mm in height.
- Voltage: The standard voltage for a 399 battery is 1.55 volts.
- Chemistry: The 399 battery typically uses silver oxide chemistry, whereas substitutes may use alkaline or lithium chemistries.
- Capacity: Different substitutes may have varying milliamp-hour (mAh) ratings, affecting their longevity.
- Application: The intended use of the battery can differ, affecting compatibility with devices.
- Branding and Availability: Some substitutes may not be as readily available as the 399 battery.
Understanding these differences provides insight into the suitability of various options.
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Size: The size of a battery indicates its compatibility with devices. The 399 battery measures 11.6mm in diameter and 5.4mm in height. This specific size is crucial for fitting into certain devices. Substitutes may vary slightly in dimensions, which can lead to performance issues if not installed correctly.
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Voltage: The standard voltage for a 399 battery is 1.55 volts. This voltage level is essential for ensuring proper operation in devices designed for it. Substitutes may offer a different voltage, such as 1.5 volts in alkaline alternatives, which can lead to underperformance or damage in devices expecting a higher voltage.
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Chemistry: The chemistry of a battery plays a vital role in its performance and longevity. The 399 battery primarily uses silver oxide chemistry, known for a stable voltage and long lifespan. In contrast, substitutes might employ alkaline or lithium chemistries. Alkaline batteries tend to have a shorter service life in some devices, while lithium batteries may be more efficient but are generally used for different applications.
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Capacity: Capacity, measured in milliamp-hours (mAh), dictates how long a battery will last under load. The capacity of a 399 battery is often around 150-200 mAh. Substitutes might have lower or higher ratings, impacting how often users need to replace them.
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Application: The intended application for a 399 battery includes watches, calculators, and various small electronics. Substitutes may be designed for similar or entirely different types of devices. This affects both reliability and safety, as not all batteries are suited for high-drain applications.
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Branding and Availability: The availability of a 399 battery varies by brand, and substitutes may sometimes be more accessible. However, brand quality can affect performance. For example, some users prefer original brand batteries for critical applications, while others may opt for generic substitutes as a cost-saving measure.
Being aware of these distinctions can help consumers make informed choices when selecting a replacement battery.
How Do I Select the Best Substitute Battery for a 399?
To select the best substitute battery for a 399, consider the battery type, compatibility, voltage, and expected lifespan. Each of these factors plays a crucial role in ensuring the substitute battery functions correctly and meets your device’s needs.
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Battery Type: The 399 battery is typically a silver oxide battery. When selecting a substitute, look for batteries that are also silver oxide, as they provide similar voltage and current characteristics. Alternatives may include alkaline batteries, but these can vary in performance.
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Compatibility: Ensure the substitute battery physically fits in your device. Check the dimensions and terminal types. The 399 battery measures approximately 11.6mm in diameter and 5.4mm in height. Substitute batteries must match these specifications to function properly.
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Voltage: The standard voltage for a 399 battery is 1.55 volts. A compatible substitute should also provide this voltage to prevent performance issues. Using a battery with a different voltage can either underpower or damage your device.
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Expected Lifespan: Silver oxide batteries have a higher energy density than alkaline batteries, meaning they last longer under typical usage conditions. When choosing a substitute, check the estimated lifespan provided by the manufacturer to ensure it meets your needs for longevity.
Considering these points will help you choose a reliable substitute battery for a 399, guaranteeing optimal performance for your device.
What Tools Are Necessary to Replace a 399 Watch Battery?
To replace a 399 watch battery, you need specific tools and materials.
- Tools and Items Required:
– Small screwdriver (typically Phillips or flat-head)
– Tweezers
– Battery replacement (399 or compatible types)
– Magnifying glass (optional for better visibility)
– Soft cloth or mat (to prevent scratches)
Having the right tools can greatly affect the ease and success of battery replacement. Below, I will provide a detailed explanation of each tool and item needed for this task.
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Small screwdriver:
The small screwdriver is essential for opening the back of the watch. Many watches have tiny screws that need to be removed carefully. A Phillips or flat-head screwdriver commonly fits these screws. Choosing the right size prevents damaging the screws, ensuring the watch can be reassembled without issues. -
Tweezers:
Tweezers help handle small components, specifically the battery. Standard fingers may not provide the necessary precision when inserting or removing the battery from its compartment. Using tweezers allows for better grip and reduces the risk of dropping parts inside the watch casing. -
Battery replacement:
The battery is the primary component needed. A 399 battery can often be replaced with other compatible types, such as the SR920SW or LR920. Always ensure the new battery matches the voltage and physical size of the original. Incorrect replacements may lead to malfunction or leakage. -
Magnifying glass:
A magnifying glass, while optional, enhances visibility, especially for intricate watch mechanisms. It allows clearer sight of small screws, battery compartments, and circuit connections, which can otherwise be too small to observe clearly. -
Soft cloth or mat:
Using a soft cloth or mat is crucial for creating a protective workspace. It prevents scratches on the watch’s surface or screen during the battery replacement process. Additionally, it helps in catching small parts that may accidentally fall, preventing loss.
Using these tools will make the battery replacement efficient and straightforward. Each tool serves a unique purpose, contributing to a smooth process.
What Precautions Should I Take When Replacing a Watch Battery?
To replace a watch battery safely, you should take several essential precautions to avoid damaging the watch or harming yourself.
- Gather necessary tools
- Clean the work area
- Use an anti-static wristband
- Handle the battery with care
- Follow manufacturer’s instructions
- Dispose of the old battery properly
- Seal the watch correctly after replacement
These precautions ensure a successful and safe battery replacement process. Now, let’s explore these points in more detail.
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Gather Necessary Tools:
Gather necessary tools for battery replacement. Common tools include a small screwdriver (usually Phillips or flat-head), tweezers, and a case opener. Keeping the right tools organized helps streamline the process and prevents losing small components. -
Clean the Work Area:
Cleaning the work area is critical before starting. A clutter-free space reduces the risk of dropping tiny watch components and creates a safe environment for delicate work. Using a mat that prevents scratches is also beneficial. -
Use an Anti-Static Wristband:
Using an anti-static wristband helps prevent static electricity from damaging the watch’s internal components. Static discharge can harm sensitive electronic parts. This precaution is especially important for digital watches. -
Handle the Battery with Care:
Handling the battery with care is essential due to its chemical properties. Avoid touching the battery terminals with fingers, as this can cause corrosion. Using tweezers prevents physical damage and keeps the battery clean. -
Follow Manufacturer’s Instructions:
Following the manufacturer’s instructions ensures you do not void any warranty or cause irreversible damage. Each watch may have specific guidelines for replacing the battery, including how to open the case. -
Dispose of the Old Battery Properly:
Proper disposal of the old battery is crucial for environmental safety. Many batteries contain harmful chemicals that can pollute the environment. Check local regulations for battery disposal or recycling programs. -
Seal the Watch Correctly After Replacement:
Sealing the watch correctly after replacement prevents dust and moisture from entering. This step is especially important for water-resistant watches to maintain their integrity.
By adhering to these precautions, you can replace your watch battery effectively and safely.
Where Can I Purchase Substitute Batteries for a 399?
You can purchase substitute batteries for a 399 at various locations. First, visit local electronics stores, such as Best Buy or RadioShack. They often stock a wide range of batteries, including the 399 substitutes. Next, check online marketplaces like Amazon or eBay. These platforms offer numerous options and competitive prices. Additionally, pharmacy chains like Walgreens or CVS may carry them in their watch battery sections. Lastly, consider specialty battery retailers, which often have specific replacements. This approach ensures you find the right substitute battery for your needs.
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