
The SR626SW replacement battery is a crucial component for many devices, and finding the right one can be overwhelming. The SR626SW battery is a silver oxide battery that is widely used in various applications, including watches, calculators, and remote controls.
It's essential to choose the right replacement battery to ensure optimal performance and longevity. The SR626SW battery has a voltage of 1.35V and a current of 6.8mA, which makes it suitable for low-drain devices.
When selecting a replacement battery, consider the device's power requirements and the battery's capacity. The SR626SW battery has a capacity of 675mAh, which is sufficient for most low-drain devices.
Proper disposal of old batteries is also crucial to prevent environmental harm. The SR626SW battery is a non-rechargeable battery, and it's essential to dispose of it responsibly.
For your interest: Low Battery
Understanding SR626SW Batteries
The SR626SW battery is a silver oxide button cell battery, which means it's designed for precision devices like watches. It measures 6.8mm in diameter and 2.6mm in height.
The SR626SW battery provides a steady 1.55V output, making it ideal for devices that require a consistent voltage. Unlike alkaline equivalents, silver oxide batteries maintain a consistent voltage until they're nearly depleted, ensuring your watch keeps accurate time throughout the battery's lifespan.
To choose the right SR626SW battery for your device, check the recommended solutions in the table below:
Remember, the right match can improve your SR626SW battery performance by up to 200%.
Batteries: An Overview
Batteries are an essential component of many devices, and understanding their basics is crucial for proper use and maintenance.
The SR626SW is a type of battery that's specifically designed for precision devices.
These batteries are available in various sizes and types, but the SR626SW is a silver oxide button cell battery.
It has a diameter of 6.8mm and a height of 2.6mm, making it compact and suitable for small devices.
The SR626SW provides a steady 1.55V output, which is ideal for devices that require a consistent voltage.
Silver oxide batteries like the SR626SW are preferred for timekeeping devices due to their stable voltage output and long shelf life.
Unlike alkaline equivalents, silver oxide batteries maintain a consistent voltage until they're nearly depleted.
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What Is an?
The SR626SW battery is a silver oxide button cell battery with a diameter of 6.8mm and height of 2.6mm. It provides a steady 1.55V output, making it ideal for precision devices like watches.
The "SR" in SR626SW indicates it's a silver oxide battery, while "626" refers to its size code and "SW" means it contains sodium hydroxide electrolyte and complies with watch battery standards.
These batteries are known for their stable voltage output and long shelf life, which is why they're preferred for timekeeping devices. Unlike alkaline equivalents (LR626), silver oxide batteries maintain a consistent voltage until they're nearly depleted, ensuring your watch keeps accurate time throughout the battery's lifespan.
To put this into perspective, the Energizer 377/376 silver oxide battery has a capacity of 24 mAh and an annual self-discharge rate of ~2% at 20°C.
Here are some key characteristics of popular silver oxide 6.8 x 2.6 mm batteries:
This table highlights the differences in capacity, operating temperature, and discharge current among these popular silver oxide batteries.
What Is SW?
The "SW" in SR626SW stands for a specific type of battery electrolyte, sodium hydroxide. This is a key characteristic of the SR626SW battery.
SR626SW batteries are designed to be non-rechargeable, which means they need to be replaced once they run out of power.
Choosing a Replacement Battery
Choosing a replacement battery for your SR626SW can be a bit tricky, but don't worry, I've got you covered. The 377 battery is a popular substitute, and for good reason - it's usually the same size and voltage as the SR626SW. In fact, the 377 battery is often considered a drop-in replacement, as long as the battery compartment is large enough.
However, it's worth noting that the 377 battery has a slightly different thickness than the SR626SW, so make sure to check the dimensions before making a purchase. If the compartment is excessively tight, the 377 might not fit or compromise the internal watch components.
If you're looking for other options, you can also consider the 376, 377A, 377S, 377X, AG4, D377, G4A, G4A177, GP377, L626, LR626, SG4, SR626, SR626SW, SR66, or V377 battery. Just remember to check the specifications of your device to ensure the equivalent battery is compatible and suitable for your device.
Equivalent
Choosing a replacement battery can be a daunting task, especially when it comes to finding an equivalent for a specific type of battery. The SR626SW battery is a common one used in watches, calculators, and other small electronic devices.
One of the most important things to consider when looking for an equivalent battery is the chemistry and voltage. The SR626SW battery is a silver oxide battery with a voltage of 1.55V, and it's essential to find a replacement with the same chemistry and voltage to ensure compatibility and proper function.
There are several equivalent batteries to the SR626SW, including the 377, 376, AG4, and LR626. However, it's crucial to note that alkaline batteries like the LR626 have a lower voltage (1.5V) and shorter lifespan compared to silver oxide batteries.
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Here are some equivalent batteries to the SR626SW:
- 377: A silver oxide battery with the same voltage and dimensions as the SR626SW.
- 376: A silver oxide battery with the same voltage and dimensions as the SR626SW, but with a slightly higher capacity.
- AG4: An alkaline/silver oxide battery with a voltage of 1.5V/1.55V and the same dimensions as the SR626SW.
- LR626: An alkaline battery with a voltage of 1.5V and the same dimensions as the SR626SW.
It's worth noting that while these batteries may be equivalent in terms of size and voltage, they may not be suitable for all devices, especially those that require precise timing or high accuracy. Always check the specifications of your device to ensure compatibility with the replacement battery.
In summary, when choosing a replacement battery for your SR626SW, look for a battery with the same chemistry and voltage, and check the specifications of your device to ensure compatibility.
LR vs LR Batteries
If you're looking for a replacement battery for your device, you might be wondering what the difference is between LR and SR batteries.
These two types of batteries are often physically identical, but they differ in chemistry and performance.
SR batteries, like the SR626SW, have silver oxide chemistry, which means they have a stable voltage throughout their life and are better suited for precision instruments.
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LR batteries, on the other hand, have alkaline chemistry and are suitable for less sensitive devices.
Here's a comparison of the two:
If you're looking for a battery that will last longer and provide a stable voltage, SR might be the better choice.
How to Identify a Genuine Product
To identify a genuine product, you need to be aware of the red flags. A genuine SR626SW battery features crisp, permanent etching of the manufacturer logo, “SR626SW” code, and a date/batch stamp.
Look for factory-sealed blister packs with tamper-evident labels, consistent brand color schemes, and QR codes or holographic seals linking back to the manufacturer’s website. These are signs of a genuine product.
A genuine SR626SW battery weighs approximately 0.8 g, so if it's noticeably lighter, it may be an LR66 knock-off.
You can also test the voltage and internal resistance of the battery. A fresh SR626SW cell measures 1.55 V ± 0.01 V and exhibits ≤ 8 Ω internal resistance.
Inspect the sealing and plating of the battery as well. Authentic cells have smooth, scratch-free edges and uniform nickel plating. Rough cuts, uneven plating, or visible glue residue are signs of poor manufacturing.
Here are some key characteristics to check when verifying a SR626SW battery's authenticity:
Features and Specifications
The SR626SW replacement battery is a reliable choice for small electronic devices. It's commonly used in watches, calculators, and other gadgets.
This battery is small, with a diameter of 6.8 mm and a thickness of 2.6 mm. Its compact size makes it a great fit for devices with limited space.
The SR626SW has a nominal voltage of 1.55 volts, which is stable and consistent. This is one of the reasons it's a popular choice for devices that require a reliable power source.
You'll find that the battery has a capacity of approximately 20-30 milliampere-hours (mAh). This means it can power devices for a decent amount of time before needing to be replaced.
Discover more: Small Battery Size Chart
The SR626SW uses silver oxide chemistry, which has a low self-discharge rate. This means the battery can hold its charge for a long time when not in use.
Here's a quick rundown of the battery's key specifications:
The SR626SW has a relatively long lifespan, typically lasting 1-2 years depending on usage. It's also widely available and relatively inexpensive to replace.
Replacement Process
To replace the SR626SW battery, you'll need to position the cover correctly and press down firmly until it snaps into place, just like with snap-back watches.
This is a crucial step to ensure the battery is secure and won't come loose over time.
To safely remove the battery, use plastic tweezers to avoid short-circuit risks – metal tweezers increase the risk by 200%.
If the battery holder has a clip, press down then push outward to release, but avoid forcing it to prevent contact damage.
Replacing a 377?
Replacing a 377? Check the dimensions first, as the 377 battery is usually 2.7mm thick, close to the SR626SW's 2.6mm thickness.
The 377 battery has a similar diameter of 6.8mm, which is a good match for the SR626SW.
Most of the time, the 377 battery should fit in the battery compartment, but be cautious if the compartment is excessively tight.
A 377 battery with a 1.55V voltage output should operate consistently with the SR626SW, providing dependable energy for normal watch operations.
The voltage difference between the two batteries is not significant, so changing an SR626SW with a 377 is unlikely to affect the watch's general operation.
Consider reading: Watch Battery Size Guide
Step-by-Step Replacement Guide
Replacing a battery can seem daunting, but it's actually a straightforward process. The key is to take your time and follow the right steps.
First, ensure you're using the correct replaceable agent. In some cases, like the Casio MRW-200H, you can save up to 80% in cost by doing it yourself.
To start, you'll need to remove the old battery. Note the position and orientation of the old battery, as this will be crucial for installing the new one. Use plastic tweezers to carefully lift out the old battery, taking care not to touch any other components inside the device.

Some devices have a small tab or lever to help with removal, so be sure to check for that. If the battery holder has a clip, press down then push outward to release, avoiding forcing it to prevent contact damage.
Use plastic tweezers to avoid short-circuit risks, as metal tweezers increase the risk by 200%. This is a crucial step to prevent any damage to the device.
Here's a quick checklist to ensure you're removing the old battery safely:
- Use plastic tweezers
- Avoid touching other components
- Check for a small tab or lever
- Press down then push outward to release the clip
Once you've removed the old battery, it's time to insert the new one. Insert the new SR626SW battery in the same orientation as the old one, with the positive (+) side facing up. Use plastic tweezers to position the battery properly.
Ensure the battery sits flat in its compartment and makes good contact with the terminals. For screw-back watches, carefully align the threads and turn the back cover clockwise until snug, but don't overtighten.
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Troubleshooting and Safety
If you're experiencing issues with your SR626SW replacement battery, make sure to check the voltage and capacity to ensure it matches the original specifications.
It's also important to note that the SR626SW battery is designed for high-drain devices, so it's crucial to follow proper charging and storage procedures to prolong its lifespan.
If your battery is not holding a charge, try checking for any signs of physical damage or corrosion on the contacts.
Step 2: Safe Removal
To safely remove the old battery, use plastic tweezers to avoid short-circuit risks, as metal tweezers increase the risk by 200%.
If the battery holder has a clip, press down then push outward to release it, being careful not to force it and prevent contact damage.
Be careful not to touch any other components inside the device, especially in watches where delicate mechanisms can be easily damaged.
Some devices have a small tab or lever to help with removal, so be sure to note its position and orientation before proceeding.
Here are some general guidelines to keep in mind:
- Use plastic tweezers to avoid short-circuit risks.
- Press down then push outward to release the battery holder clip.
- Be careful not to touch other components inside the device.
Troubleshooting Tips
Troubleshooting often starts with checking the basics, like ensuring the device is properly plugged in, as seen in the "Power Issues" section.
A loose connection can cause more problems than you think, so take a closer look.
The "Electrical Safety" section warns us that overloading outlets can lead to fires, so be mindful of how many devices you're plugging in.
Unplugging devices and waiting a few minutes before plugging them back in can sometimes resolve issues, as noted in the "Power Issues" section.
In the "Preventing Electrical Fires" section, it's mentioned that avoiding overheating devices is crucial, so keep an eye on those devices that tend to run hot.
Sometimes, simply resetting a device can resolve the issue, as seen in the "Device Malfunctions" section.
Consider reading: Power Tool Battery Charger
Mistake #3: Ignoring
Ignoring battery suffixes can lead to connection issues, causing intermittent contact or full disconnection. This can result in errors of up to 15 seconds per day.
A 0.1mm thickness difference, like between SR626 and SR626SW, can cause problems. The SW version requires spacers or adjustments for proper fit.

The SW (low-drain) and W (high-drain) versions of batteries need special care. Improper fit can lead to connection issues.
Here's a quick check to ensure you're using the right battery for your device:
Failing to Detect Counterfeit Batteries
Failing to detect counterfeit batteries can be a major safety concern. Counterfeit batteries often lack authentic markings.
One way to spot a counterfeit battery is to look for laser-etched model numbers and production dates. For example, the model number SR626SW H25 indicates that the battery was manufactured in 2025.
Fake indicators are another red flag. Printed text on counterfeit batteries is often easily rubbed off, and they may lack voltage inkjet markings altogether. Brand-specific engravings are also commonly missing from counterfeit batteries.
If you're unsure whether a battery is genuine or not, it's always best to err on the side of caution and avoid using it.
Channel Comparison: Price vs Risk
When shopping for replacement batteries, you want to balance price with the risk of counterfeit products. Amazon's Fulfilled by Amazon channel offers a low unit price of $1.80 per piece, but be aware that there's a risk of counterfeit batteries from third-party sellers.

The Microbattery channel has a higher unit price of $2.20 per piece, but it comes with professional packaging that includes anti-static shielding. This can be a worthwhile investment if you're looking for a high-quality product.
Bettlink is another option to consider, with a very affordable price of $0.95 per piece. However, be prepared for high international shipping costs.
If you're willing to pay a premium, you can opt for a local watch store, which offers on-site verification and free installation. However, be aware that the price can be up to 200% higher than other channels.
If you're looking for a quick comparison, here's a table summarizing the options:
Purchasing and Storage
When choosing a replacement battery for your device, consider the size and type of the battery it requires. SR626SW batteries are a specific type that fit devices with a diameter of 6.8mm and a height of 2.0mm.
You can find SR626SW batteries in various packs online, with some sellers offering up to 20 batteries per pack. This can be convenient for those who need multiple replacements.
To store your SR626SW batteries, keep them in a cool, dry place, away from metal objects that can cause them to short circuit.
Purchasing Channels and Brands

You can find SR626SW and 377 batteries at local businesses, such as department stores, watch repair shops, and battery outlets. They're also available online at stores like Amazon, eBay, and specialist watch accessory websites.
The cost of these batteries varies depending on the brand and sales. SR626SW batteries usually range from $2 to $5, while 377 batteries might be a bit less expensive, typically costing between $1.50 and $4.
If you're looking for a reliable online source, Amazon offers genuine Renata batteries, but be aware that there's a risk of counterfeit batteries from third-party sellers. Microbattery provides professional packaging with anti-static shielding, but their high international shipping cost might be a drawback.
If you prefer to buy from a local watch store, you'll get on-site verification and free installation, but be prepared for a potentially high price markup of up to 200%.
Spare Battery Storage
Properly storing spare batteries is essential to maintaining their shelf life and performance. Store spare SR626SW batteries in their original packaging to keep them fresh.
Room temperature is ideal for storing spare batteries, so keep them away from extreme temperatures. This will help prevent any damage or degradation.
Avoid storing spare batteries near metal objects that could short-circuit them. This is a common mistake that can lead to battery failure.
Store spare batteries out of reach of children and pets to prevent any accidents or mishaps.
Here's a quick summary of the storage tips for spare SR626SW batteries:
- Keep them in their original packaging
- Store in a cool, dry place (room temperature is ideal)
- Avoid extreme temperatures
- Keep away from metal objects that could short-circuit them
- Store out of reach of children and pets
Properly stored, SR626SW batteries typically have a shelf life of 5-10 years.
Frequently Asked Questions
What is SR626SW also known as?
SR626SW is also known as V377, D377, 606, BA, 280-39, SB-AW, SR66, GP377, V565, and AG4. These alternative names highlight its versatility in powering a wide range of watches.
Is it worth replacing a watch battery?
Replacing a watch battery is a simple and necessary step to prevent damage to your watch's internal components. If you notice any signs of a dead battery, such as dimming or flickering backlight, it's worth replacing it to keep your watch running smoothly.
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