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Household

3LR12 battery replacement and equivalents

3LR12 is a 4.5 V alkaline manganese dioxide rectangular battery measuring 67 × 22 × 62 mm. Match the complete specification before treating another marking as a replacement.

1289MN1203
Nominal voltage
4.5 V
Dimensions
67 × 22 × 62 mm
Chemistry
Alkaline manganese dioxide

3LR12 specifications

Canonical code3LR12
Formrectangular
RechargeableNo
Drain markingNot specified

Typical applications

  • Household electronics
  • lights
  • remotes
  • portable devices

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.

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.