CR2430 vs CR2450
Both are 24.5 mm 3 V lithium coin cells. The CR2450 is 5 mm thick against 3 mm, giving it roughly double the capacity.
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Both are 24.5 mm across and both give 3 volts. The CR2450 is 2 mm thicker and lasts about twice as long. A CR2450 will not fit a compartment cut for a CR2430 — 2 mm is far too much to force. The other way round a CR2430 may go in, but it will sit loose and can drop contact.
- Verdict:
- CR2450 for runtime, CR2430 where the holder is shallow
- Interchangeable:
- sometimes — check the fit
Side-by-side specifications
| Specification | CR2430 | CR2450 |
|---|---|---|
| Chemistry | Lithium | Lithium |
| Type | Coin Cell | Coin Cell |
| Nominal voltage | 3 V | 3 V |
| Diameter | 24.5 mm | 24.5 mm |
| Height | 3 mm | 5 mm |
| Typical capacity | 270–300 mAh | 560–620 mAh |
| Rechargeable | No | No |
| Also sold as | DL2430, BR2430, ECR2430 | DL2450, BR2450 |
Size comparison
Both are 24.5 mm across, so only thickness separates them: CR2430 at 3 mm against CR2450 at 5 mm.
Thickness
5 mm against 3 mm. A 2 mm gap is large for a coin cell — the CR2450 is two-thirds thicker again, and forcing one into a CR2430 holder will bend the contact or the lid.
Runtime
560–620 mAh against 270–300 mAh. The CR2450 roughly doubles the time between changes, which is why it is chosen for sensors left alone for years.
Where each turns up
The CR2450 is the default in smart-home sensors and access badges. The CR2430 appears where a designer wanted the wider 24.5 mm contact area but had no room for a 5 mm cell.
Both are the wide format
At 24.5 mm across, these two belong to the larger coin cell family rather than the 20 mm one that CR2032 heads. A device built around either has a visibly bigger compartment, and no 20 mm cell will bridge its contacts, so the choice is only ever between these two.
Why a designer picks the thinner one
The CR2430 exists for products that want the wider cell's contact area and lower internal resistance but have no room for 5 mm of depth. Slim access badges and some medical monitors are the usual examples. It is a packaging decision, not a performance one.
Long service intervals make the gap matter
These cells go into things opened rarely — alarm sensors, badge readers, telemetry. Doubling from 270–300 mAh to 560–620 turns a two-year replacement cycle into a four-year one, and for a building full of sensors that halves a maintenance job.
Can I use a CR2450 instead of a CR2430?
It depends which way round. Both cells are 24.5 mm across, so the only difference is thickness. The thinner CR2430 will usually drop into a holder built for the CR2450, but it can sit low and lose contact with the sprung terminal. The reverse does not work: a 5 mm CR2450 will not fit a compartment cut for a 3 mm CR2430, and forcing it risks bending the contact or the cover.
Check before you swap. Batteries with similar dimensions are not always interchangeable. Always verify voltage, chemistry and the requirements printed in your device manual before fitting a replacement.
CR2430 vs CR2450: common questions
Is the CR2450 a direct replacement for the CR2430?
Both are 24.5 mm across and both give 3 volts. The CR2450 is 2 mm thicker and lasts about twice as long. A CR2450 will not fit a compartment cut for a CR2430 — 2 mm is far too much to force. The other way round a CR2430 may go in, but it will sit loose and can drop contact.
What is the difference between the CR2430 and the CR2450?
Both are 24.5 mm 3 V lithium coin cells. The CR2450 is 5 mm thick against 3 mm, giving it roughly double the capacity. In short: cR2450 for runtime, CR2430 where the holder is shallow.
Are the CR2430 and the CR2450 the same size?
No. The CR2430 is 24.5 × 3 mm and the CR2450 is 24.5 × 5 mm.
Which lasts longer, the CR2430 or the CR2450?
The CR2450. It is rated at 560–620 mAh against 270–300 mAh for the CR2430 — roughly 2.1× the capacity, though real runtime depends on how much current your device draws.
Background reading
The wider questions behind these two codes.