TIANQIUWatch Battery Replacement — Find the Right Battery
Get the correct watch battery by brand or model and swap it in minutes. Silver-oxide and lithium watch cells, factory direct with bulk & OEM supply.
How do I find my watch battery by brand?
Pick your watch brand to jump straight to the cell it uses and the replacement guide. 6 brand pages are live today — Apple, Fossil, Seiko, Citizen, Timex, Bulova — and the model table below covers the common watch cells regardless of brand. Always confirm against the number printed on the cell you remove, because a watch brand can change movements between model years.
An Apple Watch has a sealed rechargeable battery — there is no coin cell to replace. The CR2032 is the cell Apple's AirTag and older Macs take.
Apple Watch battery explained →Fossil analog watches commonly take a 377 cell. Always match the number printed on the cell you remove.
Fossil battery replacement →Seiko analog watches commonly take a 377 cell. Always match the number printed on the cell you remove.
Seiko battery replacement →Citizen analog watches commonly take a 377 cell. Always match the number printed on the cell you remove.
Citizen battery replacement →Timex analog watches commonly take a 377 cell. Always match the number printed on the cell you remove.
Timex battery replacement →Bulova analog watches commonly take a 377 cell. Always match the number printed on the cell you remove.
Bulova battery replacement →What size and voltage is my watch battery?
These are the silver-oxide and lithium cells that cover most men's and women's watches. Every figure below comes from our own product data: voltage, diameter, thickness, rated capacity and the equivalent numbers each cell is sold under. Match the model number, or measure the diameter and thickness of your old cell and match both.
| Model | Voltage | Diameter | Thickness | Capacity | Chemistry | Equivalent numbers |
|---|---|---|---|---|---|---|
| SR626 | 1.55V | 6.8mm | 2.6mm | 27mAh | Silver Oxide | SR626SW = 377 = 376 |
| 377 | 1.55V | 6.8mm | 2.6mm | 24mAh | Silver Oxide | SR626SW = SR626 = 376 |
| 371 | 1.55V | 9.5mm | 2.1mm | 38mAh | Silver Oxide | SR920SW = 370 |
| 364 | 1.55V | 6.8mm | 2.1mm | 18mAh | Silver Oxide | SR621SW = AG1 |
| CR2032 | 3.0V | 20mm | 3.2mm | 190mAh ~ 255mAh | Lithium | 5004LC = ECR2032 = KCR2032 |
Are these watch cells actually made by TIANQIU?
Yes. Silver-oxide is one of the three button-cell chemistries we produce ourselves — it is not a traded-in line. We run mercury-free silver-oxide and lithium button cells, and 0% mercury alkaline cells, on Japanese MITSUBISHI full-automatic lines inside our own 100,000 m² plant.
| Silver-oxide line | Produced in-house (SR range: 377/SR626SW, 371, 364, SR44 and more) — not brokered |
|---|---|
| Manufacturing lines | Japanese MITSUBISHI full-automatic lines |
| Mercury | 0% mercury alkaline button cell; lithium & silver-oxide button cells are mercury-free |
| Silver-oxide partners | Sole agent for SEIZI (Japan); silver-oxide technology partner of Japan SOXEY |
| Certifications held | ISO 9001:2015 · ISO 45001:2018 · BSCI · UL (selected product lines) · UN38.3 (lithium cells) · CE · RoHS · SGS · PONY · Maritime Certification · Air Transport Certification |
How do I identify my watch battery model?
Three ways to pin the cell down, in order of reliability. The printed number on the old cell beats everything else; the watch manual or brand spec sheet is the next best source; measuring with calipers is the fallback once the print has worn off. Match both diameter and thickness, never diameter alone.
Read the old cell
Open the case back and read the number on the battery — 377, SR626SW, 371, 364 or CR2032 are the most common.
Check the manual
Your watch or brand spec sheet lists the recommended cell size and voltage for the movement.
Measure if worn
If the print is gone, measure diameter and thickness with calipers and match both in the table above.
How do I replace a watch battery?
Replacing a watch battery takes a few minutes with the right tools: a watch-back tool or a flat-head screwdriver to lift the case back, and non-metallic tweezers to lift the cell without shorting it. Match the size and voltage exactly, note which side faces up, and never force the case back shut.
How Long Does a Watch Battery Last?
The movement decides how fast the cell is used up — the same 377 lasts far longer in a plain three-hand watch than behind a chronograph, a light or an alarm. We publish the rated capacity of each cell rather than a single life figure, because capacity is the number we can measure and declare.
How do I buy watch batteries in bulk?
Order the cells factory-direct with your own label on the cell, the blister card and the box. Button and coin cells start from 50 cartons per product line, and the certification set ships with the order.
Wholesale
Ready stock and distributor pricing on the common watch cells.
Wholesale →OEM / private label
Your brand printed on the cell, blister card and box — from 50 cartons per product line.
OEM options →Certifications
ISO 9001 · ISO 45001 · UL (selected product lines) · UN38.3 (lithium cells) · CE · RoHS — the set we actually hold.
Certification library →Send your spec
Send voltage, size, capacity and your artwork — we quote, sample, then scale.
Contact us →What do buyers ask about watch batteries?
How do I know what battery my watch takes?
Can I replace a watch battery myself?
Is a 377 battery the same as SR626SW?
How long does a watch battery last?
Which battery is best for a wristwatch — silver oxide or lithium?
Do you actually manufacture these watch cells?
Can you supply watch cells with my own brand on them?
Which watch battery guides should I read?
The model pages carry the full specification and the equivalent-number chain for each cell, which is where the interchangeable markings are listed. The guides below cover the other devices that run on the same coin cells — car key fobs, motherboard CMOS, and the wider button cell range from the factory. Sealed watches are the exception, which is why they are handled separately on Apple Watch batteries; every cell we make is on all battery models, and the remaining questions are in the battery FAQ.
377 / SR626SW
Most common small watch battery — 6.8mm × 2.6mm silver-oxide.
View 377 battery →371 / SR920SW
Wider 9.5mm silver-oxide cell for larger watch movements.
View 371 battery →364 / SR621SW
Thin 6.8mm × 2.1mm silver-oxide cell for slim watches.
View 364 battery →Key Fob Battery
CR2032/CR2025 coin cells for car key fobs and remotes.
Key fob guide →CMOS Battery
CR2032 motherboard CMOS battery replacement guide.
CMOS guide →All Button Cells
Browse every coin cell model from the TIANQIU factory.
View all →How do I get a watch battery quote?
Factory-direct silver-oxide and lithium watch cells with OEM custom label and packaging, printed in our own plant. Send the model you need — or just the number printed on your old cell — and we will come back with pricing, the MOQ for your packaging format and the certification set.