What is a SR726SW battery?

SR726SW is a silver-oxide watch cell (about 7.9 × 2.6 mm). Casio Baby-G BGA-110 (module 5001) on this site takes one SR726SW. Jeweller packs often say 397 (396 is the related SR726W label). Not a lithium CR coin. See watch battery size codes.

What do the letters in SR726SW 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 SR726SW also called?

SR726SW pack labels and aliases on this site include 397, 396, SR726W, V397, V396, D397, D396, SR59. These are names for the same battery entity — not chemistry substitutes.

What devices use a SR726SW?

Examples on this site: Casio BGA-110. Always confirm on the device page.

Battery

SR726SW

1.55V silver oxide button cell

396 is a pack label for SR726SW — same battery, different name on the package.

Chemistry: silver_oxide
Voltage: 1.55 V
Diameter: 7.9 mm
Thickness: 2.6 mm
Used by: 1 device

Common uses: Watches

Common questions

What is a SR726SW battery?: SR726SW is a silver-oxide watch cell (about 7.9 × 2.6 mm). Casio Baby-G BGA-110 (module 5001) on this site takes one SR726SW. Jeweller packs often say 397 (396 is the related SR726W label). Not a lithium CR coin. See watch battery size codes.
What do the letters in SR726SW 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 SR726SW also called?: SR726SW pack labels and aliases on this site include 397, 396, SR726W, V397, V396, D397, D396, SR59. These are names for the same battery entity — not chemistry substitutes.
What devices use a SR726SW?: Examples on this site: Casio BGA-110. Always confirm on the device page.

Other names

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

397 · 396 · SR726W · V397 · V396 · D397 · D396 · SR59

Related codes

Same battery / other names

SR726SW397

Also sold as

Renata/watch-trade 397 → SR726SW

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

1.25 mm

1.45 mm

1.65 mm

2.1 mm

2.6 mm

3.1 mm

3.6 mm

3.6 mm

3.6 mm

3.6 mm

5.4 mm

5.4 mm

Devices using SR726SW

Casio BGA-110Watches · Baby-G BGA · Featured

Used in

Watches1 device

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 SR726SW?

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

Renata/trade 397 (396 ≈ SR726W). Silver oxide watch cell.