362 / SR721SW battery equivalent

Also sold as SR721SW. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry

Silver oxide

Voltage

1.55 V

Size

7.9 × 2.1 mm

Inches

0.311 × 0.083 in

Drain

Low drain (SW)

Typical capacity

~24 mAh

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Equivalents by brand

Brand	Number
Renata	362
Energizer / Eveready	362
Maxell / Panasonic / Sony	SR721SW
Varta	V362
Rayovac	362
Duracell	D362
Philips	362
Bulova	601
Timex	S
Citizen	280-29
Seiko	SB-AK/DK
IEC	SR58
IEC size	SR721

Also known as

SR721SWV362D362601S280-29SB-AK/DKSB-AKSB-DKSR58SR721SG11

What it fits

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 SR721SW is about 7.9 mm across and 2.1 mm thick.

Same size, different drain

These cells share the 7.9 × 2.1 mm can. Low-drain (SW) is for simple analog watches. High-drain (W) handles lights, alarms, and chronographs. A modern multi-drain cell can usually cover both.

FAQ

What battery replaces a 362?

Any of these are common equivalents: 362, SR721SW, V362, D362, 601, S, 280-29, SB-AK/DK. They are 1.55 V silver oxide cells, 7.9 × 2.1 mm.

Is 362 the same as SR721SW?

Yes — SR721SW is the IEC / Japanese-brand name for the same 362 cell.

What devices use a 362?

Analog watches