CR2450 vs BR2450
Same 24.5 × 5.0 mm size. CR2450 (Li-MnO2) usually offers higher capacity at room temperature; BR2450 (Li-CFx) is chosen for wider temperature range and long-term industrial backup.
Last verified Aug 25, 2026
Interchangeable in many holders — pick chemistry based on environment and datasheet.
Fit can look fine while chemistry, drain class, or temperature rating is still wrong. Use the stamp on the old cell, then the rows that differ in the spec table — not the fact that both cells are round.
They share 3 V and 24.5 mm diameter, which is why CR2450 vs BR2450 looks interchangeable on a store shelf. Highlighted rows are the ones that change the purchase: chemistry, capacity.
Read physical fit before capacity. Extra milliamp-hours only help when the holder is built for that cell. A “better” spec in the wrong tray is a mechanical or voltage mismatch, not an upgrade.
If you searched BR2450 vs CR2450, you are on the same comparison with the names reversed. The difference between CR2450 and BR2450 batteries is not the word “vs” — it is the specs that do not match after you ignore the similar photos.
Even when the cans look related, CR2450 (LiMnO2) and BR2450 (LiCFx) are different product classes. Capacity, voltage sag, temperature range, and whether the cell can be charged all follow chemistry — not the photo on the listing.
Typical CR2450 capacity is 550–620 mAh. BR2450 is 500–550 mAh. Runtime only follows that gap inside the correct holder. Extra capacity in the wrong tray does not last longer — it often does not run at all.
BR2450: better for temperature extremes / long industrial backup
Always follow the board or device datasheet when BR is specified
Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. CR2450 measures 24.5 × 5 mm; BR2450 measures 24.5 × 5 mm. Once you read the code that way, BR2450 vs CR2450 stops looking like a preference and starts looking like a fit check.
Sometimes. CR2450 may physically sit where BR2450 sat, but chemistry or drain class can still be wrong. Watches, meters, and charged circuits are where “it fits” is not enough.
If the door closes without force and the device asks for this chemistry, a quality CR2450 can work. If the datasheet named BR2450 for a reason — temperature, drain, or charge control — keep that code.
The same “sometimes” applies with the names reversed. Confirm chemistry and the movement or board chart, not just whether the can drops in.
A cheaper substitute that sags under load will look fine for a week and then make a watch run slow or a meter drift.
Retail packs hide the IEC size behind house codes. CR2450 also appears as DL2450, ECR2450, BR2450. BR2450. Those prefixes do not change the outline unless the chemistry letters change (BR, LIR, ML, PR).
You do not need a full datasheet to settle CR2450 vs BR2450. You need the stamp, the tray, or a cheap pair of calipers. A store bin labeled only “button cell” or “3V lithium” will not do that work for you.
Fit is usually fine. Do not assume capacity numbers are identical across CR and BR lots.
Do not stack cells, grind a can, or use foil as a permanent spacer to fake BR2450 with CR2450. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.
Often yes indoors. For specified wide-temperature designs, keep BR2450.
Yes. CR2450 vs BR2450 and BR2450 vs CR2450 are the same pair. Fit, voltage, and chemistry do not change when you flip the order.
Use this guide as a starting point, then confirm voltage, chemistry, and physical size with your device manual or the marking on the old cell.
Reviewed by PlainBattery Technical Review Desk on 2026-08-25. Checked: both model identities and dimensions, voltage and chemistry differences, physical fit, interchangeability conclusion and safety warnings.
Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.
