Watch Battery Cross Reference Chart: Find the Right Battery Replacement
Finding the correct replacement battery for your watch can sometimes be confusing. With so many battery numbers, sizes and brands available, it is easy to mistake one battery for another. You might come across references such as SR621SW, SR521SW, SR626SW, CR2016, CR2025 or CR2032, each designed for specific applications and requirements.
The good news is that a watch battery cross reference chart makes identifying compatible battery numbers much easier. Different manufacturers may use different reference numbers for batteries with matching specifications, meaning you may find the same battery listed under several names.
Whether you are replacing a dead watch battery, maintaining multiple timepieces or looking for a suitable alternative, understanding battery codes and their equivalents can help you make a more informed choice.
In this guide, we will explore common watch battery equivalents, explain the differences between popular battery types and provide a handy cross reference chart to help you find the right replacement.
What Is a Watch Battery Cross Reference Chart?
A watch battery cross reference chart is a reference guide that helps identify equivalent battery numbers across different manufacturers and naming systems.
For example, a battery labelled SR621SW may also be sold under the reference number 364. Similarly, SR626SW is commonly identified as 377, while SR521SW is known as 379.
These alternative numbers make it easier to identify replacement options when shopping for watch batteries from different brands.
However, it is important to remember that similar battery numbers do not always mean that two batteries are interchangeable. You should check the battery chemistry, dimensions, voltage and drain requirements before choosing a replacement.
Watch Battery Cross Reference Chart
The following table covers several commonly used silver oxide watch batteries and lithium coin-cell batteries, along with their commonly recognised reference numbers.
1. Silver Oxide Watch Battery Cross Reference Chart
Silver oxide batteries are widely used in analogue quartz watches because they provide a relatively stable voltage output and reliable performance.
| Battery Reference | Common Equivalent Number | Voltage | Dimensions (Diameter Ă— Height) |
|---|---|---|---|
| SR521SW | 379 | 1.55V | 5.8 Ă— 2.15mm |
| SR621SW | 364 | 1.55V | 6.8 Ă— 2.15mm |
| SR626SW | 377 | 1.55V | 6.8 Ă— 2.6mm |
| SR616SW | 321 | 1.55V | 6.8 Ă— 1.65mm |
| SR920SW | 371 | 1.55V | 9.5 Ă— 2.05mm |
| SR927SW | 395 | 1.55V | 9.5 Ă— 2.6mm |
| SR916SW | 373 | 1.55V | 9.5 Ă— 1.6mm |
| SR1130SW | 390 | 1.55V | 11.6 Ă— 3.05mm |
| SR41SW | 384 | 1.55V | 7.9 Ă— 3.6mm |
| SR44SW | 303 | 1.55V | 11.6 Ă— 5.4mm |
Note: These are commonly used cross-reference numbers. Always verify the manufacturer's specifications and required drain characteristics before purchasing.
2. Lithium Watch Battery Cross Reference Chart
Lithium coin-cell batteries are commonly found in digital watches, electronic devices and other compact equipment.
| Battery Reference | Common Equivalent Numbers | Voltage | Dimensions (Diameter Ă— Height) |
|---|---|---|---|
| CR2016 | DL2016, ECR2016 | 3V | 20 Ă— 1.6mm |
| CR2025 | DL2025, ECR2025 | 3V | 20 Ă— 2.5mm |
| CR2032 | DL2032, ECR2032 | 3V | 20 Ă— 3.2mm |
| CR2430 | DL2430, ECR2430 | 3V | 24 Ă— 3.0mm |
| CR2450 | DL2450, ECR2450 | 3V | 24 Ă— 5.0mm |
| CR2477 | DL2477 | 3V | 24.5 Ă— 7.7mm |
| CR1220 | DL1220, ECR1220 | 3V | 12.5 Ă— 2.0mm |
| CR1620 | DL1620, ECR1620 | 3V | 16 Ă— 2.0mm |
| CR1632 | DL1632, ECR1632 | 3V | 16 Ă— 3.2mm |
Note: Equivalent prefixes can vary between manufacturers. Confirm the product datasheet before selecting an alternative.
Understanding Common Watch Battery Numbers
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Watch battery numbers may look complicated, but they provide important information about the battery's type and dimensions.
Understanding the differences between common battery codes can help you avoid ordering an incorrect replacement.
What Does SR Mean on a Watch Battery?
SR generally identifies a silver oxide battery. These batteries typically have a nominal voltage of 1.55V and are commonly used in quartz watches.
Popular examples include:
- SR521SW
- SR621SW
- SR626SW
- SR920SW
- SR927SW
Silver oxide batteries are available in several sizes and drain categories. The correct selection depends on the watch movement and its power requirements.
What Does CR Mean on a Watch Battery?
CR identifies a lithium manganese dioxide coin-cell battery, generally providing a nominal voltage of 3V.
These batteries are commonly used in digital watches and various compact electronic devices.
Popular examples include:
- CR2016
- CR2025
- CR2032
- CR2430
- CR2450
- CR2477
Although these batteries may have similar appearances, their dimensions and capacities differ. Always check the exact battery reference required by your device.
What Does LR Mean on a Watch Battery?
LR generally identifies an alkaline button-cell battery.
Some common examples include LR621, LR626 and LR44.
You may also encounter AG1, AG4 and AG13 references when shopping for button-cell batteries.
Although certain LR batteries share similar physical dimensions with silver oxide batteries, they have different chemistry and electrical characteristics. An alkaline battery should not automatically replace a silver oxide battery.
Know About: How to Find the Right Battery for Your Watch: A Complete Guide
SR521SW vs SR621SW vs SR626SW: What Is the Difference?
These three battery references are commonly searched by people looking for watch battery replacements. However, they are not interchangeable.
Here is a quick comparison:
| Feature | SR521SW | SR621SW | SR626SW |
|---|---|---|---|
| Common equivalent | 379 | 364 | 377 |
| Voltage | 1.55V | 1.55V | 1.55V |
| Diameter | 5.8mm | 6.8mm | 6.8mm |
| Height | 2.15mm | 2.15mm | 2.6mm |
| Battery chemistry | Silver oxide | Silver oxide | Silver oxide |
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The SR521SW is smaller in diameter than the SR621SW and SR626SW. Meanwhile, the SR626SW is thicker than the SR621SW.
Even though all three batteries have the same nominal voltage, their physical dimensions prevent them from being used as automatic substitutes.
Always check your watch's original battery reference before ordering a replacement.
CR2016 vs CR2025 vs CR2032: Which Battery Do You Need?
CR2016, CR2025 and CR2032 are three popular lithium coin-cell batteries. They share the same diameter but have different thicknesses.
| Battery | Diameter | Thickness | Voltage |
|---|---|---|---|
| CR2016 | 20mm | 1.6mm | 3V |
| CR2025 | 20mm | 2.5mm | 3V |
| CR2032 | 20mm | 3.2mm | 3V |
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The main difference is their thickness and available capacity.
A CR2032 is thicker than a CR2025, while a CR2016 is the thinnest of the three.
If your device requires a CR2025 battery, using a CR2032 simply because it has the same diameter may prevent the battery compartment from closing properly.
For reliable performance, always use the battery size recommended by the device manufacturer.
How to Find the Correct Replacement Battery for Your Watch
If you are unsure which battery your watch requires, follow these simple steps before purchasing a replacement.
1. Check the Number on Your Existing Battery
The easiest way to identify a replacement is to check the number printed on your existing battery.
Look for references such as SR621SW, SR521SW, 377, 364, CR2016 or CR2032.
You can then use the cross reference chart above to identify commonly recognised equivalent numbers.
2. Check Your Watch Manual
If the original battery is missing or its markings are difficult to read, consult your watch instruction manual.
Most manufacturers provide battery specifications in their product documentation.
3. Check the Battery Dimensions
If you cannot identify the battery number, its physical dimensions may help narrow down the options.
Measure the diameter and thickness carefully using a suitable measuring instrument.
However, dimensions alone are not enough to confirm compatibility. You must also consider voltage, chemistry and drain characteristics.
4. Match the Battery Chemistry
Check whether your watch requires a silver oxide, lithium or alkaline battery.
Using an incorrect battery chemistry may affect performance and compatibility, even when the physical dimensions appear similar.
5. Consider the Manufacturer's Specifications
Different manufacturers may use different battery reference numbers for equivalent products.
Always check the original battery specifications and the replacement manufacturer's compatibility information before purchasing.
What Are SW and W Watch Battery Types?
You may notice additional letters in watch battery references, such as SR626SW and SR626W.
These letters generally indicate the battery's intended discharge characteristics.
-
SW (Low Drain): Typically designed for watches with relatively low and steady power requirements, such as standard analogue quartz movements.
-
W (High Drain): Generally designed for devices with higher current demands, including certain chronograph and multifunction watch movements.
For example, 377 (SR626SW) and 376 (SR626W) have the same nominal dimensions but different drain characteristics.
They should not automatically be treated as interchangeable. Follow the watch manufacturer's battery recommendation.
Also Know: CR2032 vs CR2025 vs CR2016: What's the Difference?
Common Mistakes to Avoid When Replacing a Watch Battery
Choosing the wrong battery can cause fitting problems or affect the operation of your watch.
Here are some common mistakes to avoid:
1. Choosing a Battery Based Only on Appearance
Two button-cell batteries may look almost identical but have different dimensions, voltage or chemistry.
2. Ignoring the Battery Number
Always check the original battery reference rather than guessing based on the watch's size or brand.
3. Confusing Silver Oxide and Alkaline Batteries
Batteries with similar dimensions may have different electrical characteristics. Do not assume an LR battery is a suitable replacement for an SR battery.
4. Ignoring Battery Thickness
Even a small difference in thickness can affect how the battery fits inside the watch.
5. Choosing the Wrong Drain Type
Some watch movements require low-drain batteries, while others need high-drain versions. Check the manufacturer's recommendation.
6. Using Poor-Quality Replacement Batteries
Choose batteries from reputable manufacturers and check the packaging, specifications and expiry information before installation.
Read About: Traveling With Watches? Here Are the Best Travel Cases
Essential Tools for Watch Battery Replacement
Replacing a watch battery may require more than simply purchasing the correct replacement cell.
Depending on the watch's design, you may need specialised tools to open the case, remove the old battery and install the replacement safely.
Some useful watch maintenance tools include:
- Watch case openers for removing screw-down or snap-on case backs.
- Precision screwdrivers for watches with small retaining screws.
- Non-magnetic tweezers for handling small components.
- Watch holders for keeping the watch secure during maintenance.
- Battery testers for checking the condition of compatible batteries.
If you prefer to replace your watch battery at home, having the right equipment can make the process easier.
Explore the watch repair tools collection at That Watch Shop to find useful accessories for basic watch maintenance.
For valuable, water-resistant or complicated watches, professional battery replacement is recommended. Opening a watch incorrectly can damage its case, movement or water-resistance seals.
Where to Buy Watch Batteries in New Zealand?
Once you have identified the correct battery reference, the next step is finding a suitable replacement from a reliable supplier.
At That Watch Shop, you can explore a selection of watch batteries in different sizes, specifications and pack quantities.
Whether you need a silver oxide battery such as SR521SW or SR621SW, or a lithium coin cell such as CR2016, CR2025, CR2032, CR2450 or CR2477, checking the available options can help you find a suitable replacement for your device.
Browse our watch batteries collection to explore available replacement batteries from recognised brands, including Renata, Panasonic, Sony and other manufacturers.
If you are planning to carry out the replacement yourself, you can also browse our watch tools collection for useful maintenance accessories.
Frequently Asked Questions About Watch Battery Cross References
Q. Is SR621SW the same as 364?
Ans. SR621SW is commonly identified by the reference number 364. These numbers generally refer to the same silver oxide battery size and specification. Always check the manufacturer's product details before purchasing.
Q. What battery replaces SR521SW?
Ans. SR521SW is commonly cross-referenced as 379. It is a 1.55V silver oxide battery measuring approximately 5.8mm in diameter and 2.15mm in height.
Q. Is SR626SW the same as 377?
Ans. Yes. SR626SW is commonly sold under the reference number 377. Both identify a silver oxide battery with dimensions of approximately 6.8mm Ă— 2.6mm.
Q. Can I replace SR626SW with LR626?
Ans. Although these batteries have similar physical dimensions, SR626SW is a silver oxide battery, while LR626 is alkaline. They have different electrical characteristics, so they should not automatically be treated as interchangeable. Follow your watch manufacturer's recommendation.
Q. Are CR2016, CR2025 and CR2032 interchangeable?
Ans. No. All three batteries have a diameter of 20mm, but their thicknesses differ. CR2016 measures 1.6mm, CR2025 measures 2.5mm and CR2032 measures 3.2mm. Always use the battery specified for your device.
Q. How do I know which battery my watch needs?
Ans. Check the number printed on the existing battery, consult the watch manual or look up the watch model through the manufacturer's documentation. A professional watchmaker can also help identify the correct replacement.
Q. How long does a watch battery last?
Ans. Battery life depends on the watch movement, battery chemistry, functions and usage. A basic quartz watch may operate for several years on a battery, while watches with additional functions or higher power requirements may need more frequent replacement.
Q. Can I use a different brand of watch battery?
Ans. Yes, provided the replacement battery has the correct specifications and is approved as compatible with your watch. Different brands may use alternative reference numbers for equivalent battery types.
Final Thoughts
Finding the right watch battery replacement becomes much easier when you understand battery reference numbers and their equivalents.
Whether you are looking for a 364, 377, 379, 371, CR2016, CR2025 or CR2032, a watch battery cross reference chart can help narrow down the available options and make your search more convenient.
However, always remember that matching numbers, dimensions and battery chemistry are essential when selecting a replacement. Never assume that two batteries are interchangeable simply because they look similar.
Explore the watch batteries collection at That Watch Shop to find suitable replacement options and keep your timepieces running reliably. You can also discover our range of watch repair tools to help with your watch maintenance needs.