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Battery

SR626SW

1.55V silver oxide button cell

D377 is a pack label for SR626SW — same battery, different name on the package.

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 Diagram

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

Same battery

Same battery, different label.

Same battery

Same battery, different label.

Same battery

Same battery, different label.

Same battery

Same battery, different label.

Same battery

Same battery, different label.

Same battery

Same battery, different label.

Same size, different battery

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.

1.65 mm

2.15 mm

2.15 mm

2.6 mm

2.6 mm

Devices using SR626SW

5

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

Used in

Watches5 devices

Brands: Seiko

Compare

LR626 vs SR626SWCompare

Learn more

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.

Coin cell / button cell battery tester
Quick check of CR / LR / SR button and coin cells before fitting
Buy on Amazon More tools
ZTS Mini-MBT Multi-Battery Tester
More informative state-of-charge style checks across common formats
Docs Buy on Amazon More tools
BT-168D-class digital battery tester
Budget household go/no-go checks
Buy on Amazon More tools

Coin / button cell tester
Quick check for CR / LR / SR coin cells
Open-circuit voltage alone does not prove remaining capacity.
How to test a coin cell Buy on Amazon

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 Amazon Amazon 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.