24.5mm × 5mm Battery Equivalents

3 model(s) use the same nominal 24.5mm × 5mm outline. They span 3V and LiMnO2, LiCFx, so physical fit alone does not prove that one can safely replace another. Compare the printed code, voltage, chemistry, and device requirements before buying.

Same-size model comparison

Model	Voltage	Chemistry	Capacity	Nominal size	Common labels
CR2450	3V	LiMnO2	550–620 mAh	24.5mm × 5mm	DL2450, ECR2450, BR2450, 2450
BR2450	3V	LiCFx	500–550 mAh	24.5mm × 5mm	—
DL2450	3V	LiMnO2	580–600 mAh	24.5mm × 5mm	—

Which same-size batteries can replace each other?

The checks below compare each pair by size, voltage, and chemistry. “Closest match” still requires confirmation of drain rating and terminals; “conditional” means the device manual decides; a voltage mismatch means the pair must not be substituted.

CR2450 vs BR2450

Conditional

The nominal voltage and size are close, but LiMnO2 and LiCFx have different discharge behavior. Follow the device specification.

CR2450 vs DL2450

Closest match

Size, nominal voltage, and chemistry match. Confirm drain rating, terminals, polarity, and the exact code before replacing.

BR2450 vs DL2450

Conditional

The nominal voltage and size are close, but LiCFx and LiMnO2 have different discharge behavior. Follow the device specification.

How to measure a battery with calipers

Battery dimensions are nominal and small manufacturing tolerances are normal. Dirt, a bent wrapper, raised terminals, or squeezing the jaws can shift a reading by a few tenths of a millimeter. Use the code on the old cell as the primary identifier and measurements as a check.

Remove the battery and wipe the faces and edge clean. Do not measure it inside the holder.
Close and zero the digital calipers, then measure the widest diameter without squeezing.
Measure body thickness across the flat faces. Avoid raised button terminals or welded tabs.
Repeat each measurement after rotating the cell. Treat about ±0.1–0.2 mm as normal measuring variation.
Finally confirm the printed voltage and chemistry. Never select a replacement from dimensions alone.

Review record and primary sources

Reviewed by PlainBattery Technical Review Desk on 2026-08-25. Checked: shared nominal dimensions, voltage and chemistry differences, pairwise replacement guidance.

Lithium Technical Handbook: CR Coin-Type Batteries — Panasonic Energy, 2020 handbook (2020). CR/BR dimensions, nominal voltage, capacity, discharge and temperature characteristics.

Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.