Match My Battery

Silver oxide

394 battery replacement and equivalents

394 is a 1.55 V silver oxide button battery measuring 9.5 × 3.6 mm. Match the complete specification before treating another marking as a replacement.

SR936SWD394
Nominal voltage
1.55 V
Dimensions
9.5 × 3.6 mm
Chemistry
Silver oxide

394 specifications

Canonical code394
Formbutton
RechargeableNo
Drain markinglow

Typical applications

  • Analog watches
  • calculators
  • low-drain instruments

Replacement decision

Resolve the original marking to this profile, then confirm nominal voltage, chemistry, dimensions, polarity and any drain or terminal suffix. Capacity alone does not establish interchangeability.

Reviewed comparisons

394 vs 371Same diameter · different height394 vs 399Same diameter · different height394 vs 395Same diameter · different height394 vs 370Same diameter · different height

Technical sources

  1. International Electrotechnical Commission — IEC 60086-1:2026 — Primary batteries, general requirements

    Primary-battery nomenclature, form, fit, function, terminal and electrochemical-system framework.

  2. Energizer — Battery Replacement Guide

    Cross-reference codes and manufacturer guidance to replace the same size and type together.

  3. Duracell — Battery Cross Reference Chart

    Independent manufacturer cross-reference families and corresponding product numbers.

  4. Duracell — Battery chemistry technical bulletins

    Alkaline, lithium-manganese-dioxide, zinc-air and silver-oxide chemistry behavior.