Watch Batteries and Lithium Coin Cells for Professional Repair
Shop silver oxide watch batteries and lithium coin cells for professional watch repair, battery replacement, and compatible compact electronic devices. SEP Tools carries multiple battery numbers and sizes for watchmakers, jewelers, repair shops, and service departments.
The current selection includes Renata watch batteries and lithium coin cells in professional multipacks. Regardless of brand, the replacement battery should match the required chemistry, nominal voltage, physical dimensions, drain characteristics, and device manufacturer’s specifications.
Silver Oxide Watch Batteries vs Lithium Coin Cells
Silver oxide watch batteries and lithium coin cells use different chemistries and operating voltages. They should not be treated as interchangeable, even when two batteries appear similar in diameter or thickness.
|
Battery Type
|
Nominal Voltage
|
Common Codes
|
What to Match
|
Current Pack Size
|
|
Silver oxide watch battery
|
1.55 V
|
301, 303, 364, 371, 376, 377, 395, 399, and related sizes
|
Exact battery number, IEC designation, dimensions, and drain classification
|
10 cells
|
|
Lithium coin cell
|
3 V
|
CR1025, CR1225, CR1632, CR2016, CR2025, CR2032, CR2430, and related sizes
|
Complete CR code, dimensions, polarity, and device specifications
|
5 cells
|
How to Choose the Correct Watch Battery
Match the Existing Battery Number
Begin with the number printed on the original battery or the specification provided by the watch movement or device manufacturer. A replacement should match the required chemistry, voltage, diameter, height, and electrical characteristics.
Battery cross-reference charts can help compare codes used by Renata, Energizer, Duracell, Maxell, Murata, Panasonic, Seiko, Citizen, and other manufacturers. A cross-reference should still be checked against the requirements of the specific movement or device.
Check the Chemistry and Voltage
Do not select a battery based only on its physical size. Silver oxide watch batteries commonly provide a nominal voltage of 1.55 V, while standard lithium coin cells generally provide 3 V. Installing a battery with the wrong voltage or chemistry may prevent correct operation or damage the device.
Understand Low-Drain and High-Drain Batteries
Silver oxide watch batteries may be designed for different drain requirements. Low-drain cells commonly use an IEC designation ending in SW, while high-drain versions commonly use a designation ending in W.
For example, Renata 377 corresponds to SR626SW, while Renata 376 corresponds to SR626W. These cells have similar physical dimensions, but they should be selected according to the watch movement specification rather than substituted solely because they fit the same battery compartment.
Check Diameter and Thickness
Similar-looking batteries may differ in thickness, capacity, terminal design, or discharge characteristics. Always use the complete battery designation rather than relying on appearance alone.
For example, CR2016, CR2025, and CR2032 lithium cells are all approximately 20 mm in diameter, but they differ in thickness. A CR2032 is approximately 3.2 mm high, while a CR2025 is approximately 2.5 mm high.
Silver Oxide Watch Batteries
Silver oxide batteries are commonly used in compatible quartz watch movements because they provide a stable nominal voltage in a compact format. They are available in numerous diameters, thicknesses, capacities, and drain classifications.
The current SEP Tools selection includes Renata silver oxide watch batteries in 10-count packs. Available options include compact sizes such as 335, 337, and 379, commonly requested sizes such as 364 and 377, and larger models such as 301 and 303.
Browse the available Renata watch batteries and select the exact number required for the watch movement.
Lithium Coin Cell Batteries
Lithium coin cells are compact 3 V batteries used in compatible watches, electronic measuring devices, calculators, remote controls, key fobs, and other small electronic equipment. Applications vary, so the complete CR code and device manufacturer’s specifications should be verified before installation.
The current selection includes Renata lithium coin cells in 5-count packs, with options such as CR1025, CR1216, CR1220, CR1225, CR1616, CR1620, CR1632, CR2016, CR2025, CR2032, CR2320, CR2325, CR2430, and CR2450-series batteries.
Different lithium cells may share the same diameter while providing different thicknesses and capacities. Matching only the first part of the battery number is not enough. Always verify the complete code.
Battery Brands and Cross-References
Battery manufacturers may use different commercial numbers for cells with comparable IEC designations. Cross-reference information can help identify possible equivalents, but the original battery code, chemistry, voltage, dimensions, and watch movement requirements should remain the primary selection criteria.
The current battery assortment includes Renata, a manufacturer of silver oxide watch batteries and lithium coin cells. Browse the complete Renata collection for available batteries and related professional equipment.
As additional battery brands and sizes become available, compare the technical specifications rather than choosing solely by manufacturer name or package appearance.
Battery Handling and Storage
Important Button and Coin Battery Safety
- Keep new and used batteries in their original packaging and out of reach of children and pets.
- Never place a button or coin battery in the mouth, even temporarily during watch repair.
- Do not mix different sizes, chemistries, brands, or new and used batteries inside the same device.
- Prevent loose batteries from contacting coins, tools, keys, or other conductive metal objects.
- Do not use batteries that are swollen, corroded, leaking, punctured, or otherwise damaged.
- Install batteries using the correct polarity and do not force an incorrectly sized cell into the holder.
- Recycle or dispose of used batteries according to applicable local requirements.
If a button or coin battery is swallowed or inserted into the body, seek emergency medical attention immediately. Do not wait for symptoms to appear.
Watch Repair Tools for Battery Replacement
Replacing a watch battery may require the correct tools to open and close the case without damaging the case back, gasket, screws, crystal, or exterior finish.
Complete your watch service setup with precision watchmaker screwdrivers, watch back openers, and watch case press tools.
Watch Battery FAQ
How do I find the correct replacement battery for a watch?
Check the number printed on the existing battery, the watch movement documentation, or the manufacturer’s battery specification. Confirm the chemistry, nominal voltage, dimensions, and drain designation before ordering a replacement.
What is the difference between 376 and 377 watch batteries?
In the Renata numbering system, 377 corresponds to the SR626SW designation, while 376 corresponds to SR626W. The batteries have similar dimensions but different discharge characteristics. Use the type specified for the watch movement.
What does CR2032 mean?
CR2032 identifies a 3 V lithium coin cell with an approximate diameter of 20 mm and an approximate height of 3.2 mm. The complete battery code should be matched to the device specification.
Can a lithium coin cell replace a silver oxide watch battery?
Not unless the watch or device manufacturer explicitly specifies that battery. Standard lithium coin cells generally provide 3 V, while silver oxide watch batteries commonly provide 1.55 V. Using the wrong voltage or chemistry can prevent correct operation or damage the device.
Can I select a replacement battery based only on its size?
No. Two batteries may have similar dimensions but different voltage, chemistry, capacity, drain characteristics, or terminal design. Match the complete battery number and the device manufacturer’s requirements.
Are battery numbers the same across different brands?
Not always. Different manufacturers may use different commercial numbers for comparable battery sizes. Use a reputable cross-reference guide and verify the IEC designation, dimensions, chemistry, voltage, and device requirements before substituting another brand.
How should unused watch batteries be stored?
Keep batteries in their original packaging in a dry location away from excessive heat, moisture, children, pets, and conductive metal objects. Do not store loose cells together where their terminals can contact one another.
What should I do if a button or coin battery is swallowed?
Seek emergency medical attention immediately and contact the appropriate poison control service. Do not wait for symptoms to appear, because swallowed button and coin batteries can cause serious internal injuries.
Order Watch Batteries and Lithium Coin Cells
Select the exact battery number required for the watch movement or compatible electronic device. Compare the available brand, chemistry, voltage, dimensions, drain classification, and pack quantity before ordering.
For help locating a particular watch battery or lithium coin cell, contact SEP Tools.
