Thickness — 5 mm vs 7.7 mm
CR2450 is 5 mm thick; CR2477 is 7.7 mm. Holders are built for one stack height. The thinner cell loses spring pressure (“works only when I press the cover”). The thicker cell jams the door or bends the clip.
Not interchangeable
CR2450 vs CR2477
CR2450 vs CR2477: Capacity vs Height
Same 24.5 mm diameter. CR2477 is much taller (7.7 mm) with higher capacity (~900–1000 mAh). Most CR2450 trays cannot accept the extra height.
Last verified Aug 25, 2026
Are CR2450 and CR2477 interchangeable?
Not a drop-in — only use CR2477 when the holder depth allows it.
A CR2477 vs CR2450 swap fails on thickness, capacity. If the door only closes when you force it, or the device works only while you press the cover, you have the wrong cell — not a weak spring you should ignore.
CR2450 vs CR2477 specs: thickness, capacity
They share 3 V and LiMnO2 and 24.5 mm diameter, which is why CR2450 vs CR2477 looks interchangeable on a store shelf. Highlighted rows are the ones that change the purchase: thickness, 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.
Difference between CR2450 and CR2477 batteries
If you searched CR2477 vs CR2450, you are on the same comparison with the names reversed. The difference between CR2450 and CR2477 batteries is not the word “vs” — it is the specs that do not match after you ignore the similar photos.
Capacity — 550–620 mAh vs 900–1000 mAh
Typical CR2450 capacity is 550–620 mAh. CR2477 is 900–1000 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.
Shared 24.5 mm diameter
Shared 24.5 mm diameter
Height 5.0 mm vs 7.7 mm
Height 5.0 mm vs 7.7 mm
CR2477 stores more energy when it fits
CR2477 stores more energy when it fits
How the size code works (CR2450 vs CR2477)
Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. CR2450 measures 24.5 × 5 mm; CR2477 measures 24.5 × 7.7 mm. Once you read the code that way, CR2477 vs CR2450 stops looking like a preference and starts looking like a fit check.
Can I use a CR2450 instead of a CR2477?
Usually no. CR2450 is 24.5 × 5 mm at 3 V (LiMnO2). CR2477 is 24.5 × 7.7 mm at 3 V (LiMnO2). Those are not the same part.
If the spent cell or tray said CR2477, specify that code. Forcing CR2450 can crack a cover, lose contact, or apply the wrong voltage.
Can I use a CR2477 instead of a CR2450?
Usually no. Going the other way does not fix a diameter, thickness, or voltage miss. CR2477 in a CR2450 holder has the same problem with the names flipped.
If you arrived from a CR2477 vs CR2450 search, stay on this page. The answer does not change.
Brand labels and aliases
Retail packs hide the IEC size behind house codes. CR2450 also appears as DL2450, ECR2450, BR2450. CR2477 also appears as DL2477. Those prefixes do not change the outline unless the chemistry letters change (BR, LIR, ML, PR).
How to identify CR2450 versus CR2477
You do not need a full datasheet to settle CR2450 vs CR2477. 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.
- Read the code on the old cell: CR2450, CR2477, and the brand prefixes that map to each one.
- If the print is worn off, check the tray, battery door, or user manual before buying.
- Measure diameter if the codes are gone: CR2450 is 24.5 mm; CR2477 is 24.5 mm.
- Measure thickness: CR2450 is 5 mm; CR2477 is 7.7 mm.
- Buy the matching code. Extra capacity or a thicker can only helps when the holder is built for that cell.
Choose CR2450 when…
- Standard CR2450 holders and consumer devices
Choose CR2477 when…
- Deep holders / designs that list CR2477
Compatibility and substitution
Never force a taller coin cell. Spring sets and plastic doors are easy to permanently deform.
Do not stack cells, grind a can, or use foil as a permanent spacer to fake CR2477 with CR2450. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.
CR2450 vs CR2477 FAQ
Is CR2477 always better?
Higher capacity only helps if it fits and the device can use the extra energy over time.
I searched CR2477 vs CR2450 — is this the right page?
Yes. CR2450 vs CR2477 and CR2477 vs CR2450 are the same pair. Fit, voltage, and chemistry do not change when you flip the order.
Should I always trust a cross-reference chart?
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.
Review record and primary sources
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.
- 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.