394 / SR936SW battery equivalent

Also sold as SR936SW. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry

Silver oxide

Voltage

1.55 V

Size

9.5 × 3.6 mm

Inches

0.374 × 0.142 in

Drain

Low drain (SW)

Typical capacity

~80 mAh

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Equivalents by brand

Brand	Number
Renata	394
Energizer / Eveready	394
Maxell / Panasonic / Sony	SR936SW
Varta	V394
Rayovac	394
Duracell	D394
Bulova	625
Citizen	280-17
Seiko	SB-A4
IEC size	SR936

Also known as

SR936SWV394D394625280-17SB-A4SR936SG9AG9

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 SR936SW is about 9.5 mm across and 3.6 mm thick.

Same size, different drain

These cells share the 9.5 × 3.6 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 394?

Any of these are common equivalents: 394, SR936SW, V394, D394, 625, 280-17, SB-A4, SR936. They are 1.55 V silver oxide cells, 9.5 × 3.6 mm.

Is 394 the same as SR936SW?

Yes — SR936SW is the IEC / Japanese-brand name for the same 394 cell.

What devices use a 394?

Analog watches