Battery Cross ReferenceButton cell equivalents

321 / SR616SW battery equivalent

Also sold as SR616SW. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry
Silver oxide
Voltage
1.55 V
Size
6.8 × 1.65 mm
Inches
0.268 × 0.065 in
Drain
Low drain (SW)
Typical capacity
~14 mAh
Shop 321 on Amazon See in full chart

Equivalents by brand

BrandNumber
Renata321
Energizer / Eveready321
Maxell / Panasonic / SonySR616SW
VartaV321
Rayovac321
DuracellD321
Bulova611
TimexDA
Citizen280-73
SeikoSB-AF/DF
IECSR65
IEC sizeSR616

Also known as

SR616SWV321D321611DA280-73SB-AF/DFSB-AFSB-DFSR65SR616

What it fits

Thin analog watches. Confirm the printed number or measure the old cell before you buy — a 0.5 mm height difference will not seat correctly.

IEC names encode chemistry and size. SR is silver oxide, LR is alkaline, and CR is 3 V lithium. The digits are diameter and height in tenths of a millimeter, so SR616SW is about 6.8 mm across and 1.65 mm thick.

FAQ

What battery replaces a 321?

Any of these are common equivalents: 321, SR616SW, V321, D321, 611, DA, 280-73, SB-AF/DF. They are 1.55 V silver oxide cells, 6.8 × 1.65 mm.

Is 321 the same as SR616SW?

Yes — SR616SW is the IEC / Japanese-brand name for the same 321 cell.

What devices use a 321?

Thin analog watches