What is a SR927SW battery?

SR927SW is a silver-oxide watch cell (about 9.5 × 2.7 mm). Casio MRW-210H (module 5474) and GAC-110 (module 5363) on this site each take one SR927SW. Jeweller packs often say 395 (399 is the related SR927W label). Alkaline AG7 / LR57 is a shop twin — not automatic for silver-specified movements. See watch battery size codes.

What do the letters in SR927SW mean?

S is silver oxide in the IEC system (S happens to match silver), and R means round. Same size with an LR prefix is alkaline — related size family, not the same battery. Full guide: CR vs LR vs SR.

What is SR927SW also called?

SR927SW pack labels and aliases on this site include 395, 399, SR927W, V395, V399, D395, D399, SR57. These are names for the same battery entity — not chemistry substitutes.

What devices use a SR927SW?

Examples on this site: Casio MRW-210H; Casio GAC-110. Always confirm on the device page.

Battery

SR927SW

1.55V silver oxide button cell

V395 is a pack label for SR927SW — same battery, different name on the package.

Chemistry: silver_oxide
Voltage: 1.55 V
Diameter: 9.5 mm
Thickness: 2.7 mm
Used by: 2 devices

Common uses: Watches

Common questions

What is a SR927SW battery?: SR927SW is a silver-oxide watch cell (about 9.5 × 2.7 mm). Casio MRW-210H (module 5474) and GAC-110 (module 5363) on this site each take one SR927SW. Jeweller packs often say 395 (399 is the related SR927W label). Alkaline AG7 / LR57 is a shop twin — not automatic for silver-specified movements. See watch battery size codes.
What do the letters in SR927SW mean?: S is silver oxide in the IEC system (S happens to match silver), and R means round. Same size with an LR prefix is alkaline — related size family, not the same battery. Full guide: CR vs LR vs SR.
What is SR927SW also called?: SR927SW pack labels and aliases on this site include 395, 399, SR927W, V395, V399, D395, D399, SR57. These are names for the same battery entity — not chemistry substitutes.
What devices use a SR927SW?: Examples on this site: Casio MRW-210H; Casio GAC-110. Always confirm on the device page.

Other names

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

395 · 399 · SR927W · V395 · V399 · D395 · D399 · SR57

Related codes

Same battery / other names

SR927SW395

Also sold as

Renata/watch-trade 395 → SR927SW

Same size, different battery

SR927SWLR57

Same size, different type

Silver SR927 vs alkaline AG7/LR57

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 9.5 mm family — thicker bar means thicker cell. Not to scale. Highlighted cell is this page.

1.65 mm

2.1 mm

2.7 mm

2.7 mm

3.6 mm

Devices using SR927SW

All (2)Watches (2)Casio (2)

Used in

Watches2 devices

Brands: Casio

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 SR927SW?

Search Amazon for packs of this battery code.

Buy on Amazon Amazon UK

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Notes

Renata/trade 395 (399 ≈ SR927W). Silver oxide watch cell. Alkaline shop twin is AG7/LR57 — not silver.