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Lithium coin

BR2477 battery replacement and equivalents

BR2477 is a 3 V lithium carbon monofluoride coin battery measuring 24.5 × 7.7 mm. Match the complete specification before treating another marking as a replacement.

Technical content reviewed 2026-10-04

No reviewed alternate codes
Nominal voltage
3 V
Dimensions
24.5 × 7.7 mm
Chemistry
Lithium carbon monofluoride

BR2477 specifications

Canonical codeBR2477
Formcoin
RechargeableNo
Drain markingNot specified

Typical applications

  • Long-life memory backup
  • meters
  • low-drain 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.

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. International Electrotechnical Commission — IEC 60086-2-2:2026 — Physical and electrical specifications of lithium batteries

    Standardized primary-lithium dimensions and electrical specification context.

  3. Duracell — Battery chemistry technical bulletins

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

Manufacturer example: Panasonic BR2477A and its terminals

Panasonic identifies BR2477A as a high-temperature BR coin cell. Its February 2026 datasheet specifies a 24.5 mm maximum diameter and 7.7 mm maximum height, without tabs. This is a manufacturer-specific example; do not apply its temperature or capacity ratings to every BR2477.

Retain the complete manufacturer name, BR2477A marking and terminal suffix when identifying the original part. Panasonic’s drawings show different tab arrangements; bare-cell dimensions alone do not establish mounting or terminal fit. Compare the exact drawing, polarity and device documentation. A shared number or size alone does not establish replacement compatibility.

Manufacturer references: Panasonic BR2477A datasheet (February 2026, PDF) · Panasonic BR-2477A terminal drawings (PDF).