Battery

SR616SW

1.55V silver oxide button cell

321 is a pack label for SR616SW — same battery, different name on the package.

Chemistry: silver_oxide
Voltage: 1.55 V
Diameter: 6.8 mm
Thickness: 1.65 mm
Used by: 4 devices

Common uses: Thin watches

SR616SW 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.

321 · SR616W · D321 · V321 · SR616

Related codes

No related codes listed yet.

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

Device-specific caveats

From manufacturer-backed notes on devices that use SR616SW — not generic advice.

Eco-Drive and other rechargeable cells (MT*, CTL*, SLB*, …) are excluded from this disposable CR/SR publish set.

Devices using SR616SW

All (4)Watches (4)Seiko (2)Citizen (2)

Used in

Watches4 devices

Brands: Seiko · Citizen

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Notes

Seiko SB-AF family.