393 / SR754W battery equivalent

Also sold as SR754W. 1.55 V with a flat discharge curve — the usual choice for quartz watches.

Chemistry

Silver oxide

Voltage

1.55 V

Size

7.9 × 5.4 mm

Inches

0.311 × 0.213 in

Drain

High drain (W)

Typical capacity

~80 mAh

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Equivalents by brand

Brand	Number
Renata	393
Energizer / Eveready	393
Maxell / Panasonic / Sony	SR754W
Varta	V393
Rayovac	393
Duracell	D393
Philips	393
Bulova	255
Timex	F
Seiko	SB-B3
IEC	SR48
IEC size	SR754

Also known as

SR754WV393D393255FSB-B3SR48SR754AG5

What it fits

High-drain watches and compact electronics. 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 SR754W is about 7.9 mm across and 5.4 mm thick.

Same size, different drain

These cells share the 7.9 × 5.4 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 393?

Any of these are common equivalents: 393, SR754W, V393, D393, 255, F, SB-B3, SR48. They are 1.55 V silver oxide cells, 7.9 × 5.4 mm.

Is 393 the same as SR754W?

Yes — SR754W is the IEC / Japanese-brand name for the same 393 cell.

What devices use a 393?

High-drain watches and compact electronics