365 / SR1116W battery equivalent

Also sold as SR1116W. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry

Silver oxide

Voltage

1.55 V

Size

11.6 × 1.65 mm

Inches

0.457 × 0.065 in

Drain

High drain (W)

Typical capacity

~30 mAh

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Equivalents by brand

Brand	Number
Renata	365
Energizer / Eveready	365
Maxell / Panasonic / Sony	SR1116W
IEC size	SR1116

Also known as

SR1116WSR1116

What it fits

Thin watches that need higher pulse current. 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 SR1116W is about 11.6 mm across and 1.65 mm thick.

Same size, different drain

These cells share the 11.6 × 1.65 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 365?

Any of these are common equivalents: 365, SR1116W, SR1116. They are 1.55 V silver oxide cells, 11.6 × 1.65 mm.

Is 365 the same as SR1116W?

Yes — SR1116W is the IEC / Japanese-brand name for the same 365 cell.

What devices use a 365?

Thin watches that need higher pulse current