386 / SR43W battery equivalent

Also sold as SR43W. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry

Silver oxide

Voltage

1.55 V

Size

11.6 × 4.2 mm

Inches

0.457 × 0.165 in

Drain

High drain (W)

Typical capacity

~120 mAh

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Equivalents by brand

Brand	Number
Renata	386
Energizer / Eveready	386
Maxell / Panasonic / Sony	SR43W
Varta	V386
Rayovac	386
Duracell	D386
Philips	386
Bulova	260
Timex	H
Citizen	280-41
Seiko	SB-B8
IEC	SR43
IEC size	SR1142

Also known as

SR43WV386D386260H280-41SB-B8SR43SR1142AG12

What it fits

High-drain watches, calculators, 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 SR43W is about 11.6 mm across and 4.2 mm thick.

Same size, different drain

These cells share the 11.6 × 4.2 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.

Same size, different chemistry

These fit the same cavity but are not true equivalents. Voltage and discharge curve differ — do not use them as a silent swap in a quartz watch.

FAQ

What battery replaces a 386?

Any of these are common equivalents: 386, SR43W, V386, D386, 260, H, 280-41, SB-B8. They are 1.55 V silver oxide cells, 11.6 × 4.2 mm.

Is 386 the same as SR43W?

Yes — SR43W is the IEC / Japanese-brand name for the same 386 cell.

What devices use a 386?

High-drain watches, calculators, cameras