Battery

SR421SW

1.55V silver oxide button cell

348 is a pack label for SR421SW — same battery, different name on the package.

Chemistry: silver_oxide
Voltage: 1.55 V
Diameter: 4.8 mm
Thickness: 2.1 mm
Used by: 0 devices

Common uses: Watches

SR421SW 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.

348 · V348 · D348

Related codes

Same battery / other names

SR421SW348

Also sold as

Renata/watch-trade 348 → SR421SW

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

SR416SW

1.65 mm

SR421SW

2.1 mm

Devices using SR421SW

No devices listed for this battery yet.

Learn more

Need one?

Need a SR421SW?

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 348. Very small silver oxide watch cell (4.8×2.1 mm).