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Battery

SR626SW

1.55V silver oxide button cell

SR626SW is a small silver-oxide watch cell (about 6.8 × 2.6 mm). Retail packs often say 377. Casio MQ-24 and several Seiko / Orient calibers on this site use SR626SW. LR626/AG4 fit the same size but are alkaline — see LR626 vs SR626SW.

Chemistry
silver_oxide
Voltage
1.55 V
Diameter
6.8 mm
Thickness
2.6 mm
Used by
5 devices

Common uses: Watches · Small electronics

SR626SW battery reference render

SR626SW Diagram

SR626SW orthographic diagram with top, bottom or end views and side profile dimensions
Brand-neutral outline — confirm the tray in your device.

Other names

Genuine aliases and pack labels for this battery — not substitutes of a different chemistry.

377 · 377A · SR626W · D377 · V377 · SR626 · 626

Related codes

Same battery / other names

SR626SW377

Same battery

Same battery, different label.

SR626SW377A

Same battery

Same battery, different label.

SR626SWD377

Same battery

Same battery, different label.

SR626SWV377

Same battery

Same battery, different label.

SR626SWSR626W

Same battery

Same battery, different label.

SR626SW280-39

Same battery

Same battery, different label.

Same size, different battery

SR626SWLR626

Same size, different type

Fits the same slot. Different type — check the manual.

Rechargeables are not equivalents

Do not substitute a rechargeable cell unless the device documentation explicitly allows it. Silver-oxide and lookalike chemistries are not interchangeable with rechargeables by size alone.

Size family

Edge thickness in the 6.8 mm family — thicker bar means thicker cell. Not to scale. Highlighted cell is this page.

SR616SW
1.65 mm
SR621SW
2.15 mm
LR621
2.15 mm
SR626SW
2.6 mm
LR626
2.6 mm

Devices using SR626SW

3 / 5
All (5)Watches (5)Seiko (3)

Used in

Watches5 devices

Brands: Seiko

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Testers & chargers

Optional tools that fit this cell type — only where the chemistry allows. Separate from the battery answer.

Amazon links may earn us a commission. They do not change the battery answer.

Buy links are optional and separate from the battery answer.

Need one?

Need a SR626SW?

Search Amazon for packs of this battery code.

Buy on AmazonAmazon UK

Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.

Notes

377 is the dominant retail/watch-trade search term in US+UK. LR626/AG4 fit but are alkaline.