Match My Battery

BR2450 vs CR2450: battery compatibility

A reviewed side-by-side decision based on form, fit, electrical specification and application limits.

Verdict
Same fit · different chemistry
Confidence
93%
Reviewed
2026-10-04
Same fit · different chemistry

BR2450 and CR2450 share dimensions but not the complete specification

The physical envelope and nominal voltage are close, but chemistry changes from Lithium carbon monofluoride to Lithium manganese dioxide.

Use only when the device maker explicitly approves both chemistry systems.

SpecificationBR2450CR2450
Dimensions24.5 × 5 mm24.5 × 5 mm
Nominal voltage3 V (Omnergy example)3 V
ChemistryLithium carbon monofluorideLithium manganese dioxide
RechargeableNoNo
Typical useLong-life memory backup, meters, low-drain electronicsWatches, remotes, sensors
View BR2450 profile View CR2450 profile

About Confidence: this is a fixed score attached to a comparison rule in the catalog. It is not a probability of working, a measured success rate, or device approval. Read the verdict and its reasons; a high score can accompany a non-equivalence verdict.

BR2450A vs CR2450: what does the A mean?

Panasonic identifies its BR2450A as a high-temperature BR-A coin cell. Its product page lists 3 V nominal voltage; the linked datasheet gives a 24.5 mm maximum diameter and 5.0 mm maximum height, without tabs. These figures describe that manufacturer’s product, rather than every cell marked BR2450.

Matching the nominal size and voltage of CR2450 does not establish the same temperature rating, discharge behavior or terminal fit. Keep the complete BR2450A marking when checking the device specification. Panasonic offers tab and lead-wire versions, so compare the original terminal arrangement and the manufacturer’s drawing as well as the cell body. Use a CR2450 replacement only if the device manufacturer explicitly permits it.

Manufacturer references: Panasonic BR-2450A product specifications · Panasonic BR2450A datasheet and terminal guidance (PDF).

Why this verdict

  • The physical envelope matches.
  • Nominal voltage is close.
  • Chemistry and discharge behavior differ.

What to verify in the device

Check the original compartment label, the current manual, polarity, terminal style and whether the device explicitly permits a chemistry or rechargeable alternative.

Sources for these profiles

  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.

  4. Omnergy / Yichang Power Glory — BR2450 lithium carbon monofluoride coin-cell product specifications

    Exact unsuffixed Omnergy BR2450 example: primary Li-CFx, 3.0 V, maximum body dimensions 24.5 x 5.0 mm in its product table. Not a universal BR2450 rating, terminal tolerance or replacement approval. Marketing claims about lifetime, constant output and other chemistries are not adopted.

  5. Energizer — Lithium Coin Handbook and Application Manual

    Lithium/manganese-dioxide coin chemistry, voltage, capacity, drain and application behavior.

  6. Energizer — Battery Replacement Guide

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

Keep the A suffix and terminal drawing

Use this body / terminal / application card when a bill of materials says BR2450A. The unsuffixed catalog family is not the complete part identity.

Keep the A suffix and terminal drawing — original schematic, not a photograph
Original schematic; not life-size. Read the comparison table for the observable differences.
Observe / documentInterpretationNext check
Exact body: Panasonic BR2450AMaximum body diameter 24.5 mm; height 5.0 mm, without tabsThe drawing below annotates the body only; keep the A suffix.
Panasonic BR2450A operating-temperature specification−40 °C to +125 °C in the April 2022 product datasheetProduct-specific rating only. Actual load, environment, terminal design and device approval remain separate.
Terminal or tab suffixNot supplied in this exerciseMatch the manufacturer drawing and board connection before fitting.
Application approvalTemperature, load and discharge requirements are unknownAn equal nominal envelope does not approve a CR substitution.

Limit: This worksheet intentionally does not add a new verified replacement relation or extend BR2450A specifications to every BR2450.

Sources and scope for this exercise

Compare chemistry boundaries