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Alkaline button

LR920 battery replacement and equivalents

LR920 is a 1.5 V alkaline manganese dioxide button battery measuring 9.5 × 2.1 mm. Match the complete specification before treating another marking as a replacement.

Technical content reviewed 2026-08-25

AG6
Nominal voltage
1.5 V
Dimensions
9.5 × 2.1 mm
Chemistry
Alkaline manganese dioxide

LR920 specifications

Canonical codeLR920
Formbutton
RechargeableNo
Drain markingNot specified

Typical applications

  • Toys
  • calculators
  • small lights
  • simple electronics

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.

Exact equivalents and aliases

LR920 is the canonical 1.5 V alkaline button-cell profile; AG6 is a reviewed alias. 370 and 371 are 1.55 V silver-oxide profiles with the same listed 9.5 × 2.1 mm dimensions but different W/SW drain markings.

AG6 resolves to LR920. The 370 and 371 codes do not resolve to LR920 because they identify silver-oxide profiles; keep the chemistry letters or suffixes from the original marking when searching.

MarkingCatalog profileVoltageChemistryDimensionsDecision
LR920 / AG6LR920 · Alkaline1.5 VAlkaline manganese dioxide9.5 × 2.1 mmExact alias / canonical profile
Resolves to LR920; verify polarity and the device marking.
  • Canonical code and reviewed aliases resolve to one profile.
370370 · Silver oxide1.55 VSilver oxide9.5 × 2.1 mmSame fit · different chemistry
Use only when the device maker explicitly approves both chemistry systems.
  • The physical envelope matches.
  • Nominal voltage is close.
  • Chemistry and discharge behavior differ.
371371 · Silver oxide1.55 VSilver oxide9.5 × 2.1 mmSame fit · different chemistry
Use only when the device maker explicitly approves both chemistry systems.
  • The physical envelope matches.
  • Nominal voltage is close.
  • Chemistry and discharge behavior differ.

Conditional substitutes

370 (SR920W) and 371 (SR920SW) are same-size silver-oxide comparisons. The device’s chemistry and drain requirement determine whether either is acceptable; matching 9.5 × 2.1 mm dimensions only establish a possible physical fit.

Physical fit is not electrical compatibility

A thin button cell can lose contact if the height is wrong, while a same-height cell can still have a different discharge behavior. Check both dimensions and the electrical specification before installation.

How to verify before replacing LR920

  1. Resolve AG6 to LR920 rather than treating every 920 code as an alias.
  2. Check W/SW requirements for watches and instruments.
  3. Confirm the 1.5 V alkaline or 1.55 V silver-oxide specification with the manual.

Continue with: Compare the 395 profile Understand drain suffixes Measure the original cell

Same-size batteries to review carefully

These profiles share the nominal physical envelope. They are not automatically equivalent.

371 Silver oxide 1.55 V 9.5 × 2.1 mm 370 Silver oxide 1.55 V 9.5 × 2.1 mm

Reviewed comparisons

LR920 vs 371Same fit · different chemistryLR920 vs 370Same fit · different chemistryLR920 vs LR927Same 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.