344 / SR1136SW battery equivalent

Also sold as SR1136SW. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry

Silver oxide

Voltage

1.55 V

Size

11.6 × 3.6 mm

Inches

0.457 × 0.142 in

Drain

Low drain (SW)

Typical capacity

~105 mAh

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Equivalents by brand

Brand	Number
Renata	344
Energizer / Eveready	344
Maxell / Panasonic / Sony	SR1136SW
Varta	V344
Rayovac	344
Duracell	D344
Bulova	242
IEC	SR42
IEC size	SR1136

Also known as

SR1136SWV344D344242SR42SR1136

What it fits

Analog watches and cameras. 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 SR1136SW is about 11.6 mm across and 3.6 mm thick.

Same size, different drain

These cells share the 11.6 × 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 344?

Any of these are common equivalents: 344, SR1136SW, V344, D344, 242, SR42, SR1136. They are 1.55 V silver oxide cells, 11.6 × 3.6 mm.

Is 344 the same as SR1136SW?

Yes — SR1136SW is the IEC / Japanese-brand name for the same 344 cell.

What devices use a 344?

Analog watches and cameras