CR2025 vs CR2450
Both are 3 V lithium coin cells, but at 24.5 × 5 mm the CR2450 is far larger than the 20 × 2.5 mm CR2025 and holds about four times the charge.
Last reviewed
No swap here. The CR2450 is wider and twice as thick as a CR2025, and holds roughly four times the power. Both give 3 volts, but a CR2450 will not go into a CR2025 holder and a CR2025 cannot bridge the contacts in a CR2450 one. Buy the code printed on the cell you removed.
- Verdict:
- Not interchangeable — different size class entirely
- Interchangeable:
- no
Side-by-side specifications
| Specification | CR2025 | CR2450 |
|---|---|---|
| Chemistry | Lithium | Lithium |
| Type | Coin Cell | Coin Cell |
| Nominal voltage | 3 V | 3 V |
| Diameter | 20 mm | 24.5 mm |
| Height | 2.5 mm | 5 mm |
| Typical capacity | 150–170 mAh | 560–620 mAh |
| Rechargeable | No | No |
| Also sold as | DL2025, BR2025 | DL2450, BR2450 |
Size comparison
These cells do not share a footprint, so one will not sit correctly in the other's compartment.
Size
24.5 × 5 mm against 20 × 2.5 mm. The CR2450 is wider and exactly twice as thick — the largest gap in the common coin cell range.
Runtime
560–620 mAh against 150–170 mAh, close to a fourfold difference. Devices specified for a CR2450 expect that reserve.
Both are 3 V
Voltage is not the deciding factor for any CR-coded coin cell — they all run at 3 V nominal. Fit is what separates them.
Two different size classes
The CR2025 is 20 mm across and 2.5 mm thick; the CR2450 is 24.5 by 5. That is twice the thickness and a wider disc, and the CR2450 weighs roughly three times as much. Held side by side there is no ambiguity at all.
The capacity gap is the largest in the range
150–170 mAh against 560–620 is close to fourfold, the widest span between any two common coin cells. A device specified for a CR2450 was designed around that reserve, which is part of why nothing smaller substitutes for it.
If you are unsure which you removed
Measure the diameter first. Anything 20 mm belongs to the CR2016 / CR2025 / CR2032 family and anything 24.5 mm to the CR2430 / CR2450 one. Thickness only tells you which member of the family, and only once the diameter is settled.
Can I use a CR2450 instead of a CR2025?
Not directly. The CR2450 measures 24.5 × 5 mm against 20 × 2.5 mm for the CR2025, so it will not seat properly in the same compartment.
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.
CR2025 vs CR2450: common questions
Is the CR2450 a direct replacement for the CR2025?
No swap here. The CR2450 is wider and twice as thick as a CR2025, and holds roughly four times the power. Both give 3 volts, but a CR2450 will not go into a CR2025 holder and a CR2025 cannot bridge the contacts in a CR2450 one. Buy the code printed on the cell you removed.
What is the difference between the CR2025 and the CR2450?
Both are 3 V lithium coin cells, but at 24.5 × 5 mm the CR2450 is far larger than the 20 × 2.5 mm CR2025 and holds about four times the charge. In short: not interchangeable — different size class entirely.
Are the CR2025 and the CR2450 the same size?
No. The CR2025 is 20 × 2.5 mm and the CR2450 is 24.5 × 5 mm.
Which lasts longer, the CR2025 or the CR2450?
The CR2450. It is rated at 560–620 mAh against 150–170 mAh for the CR2025 — roughly 3.7× the capacity, though real runtime depends on how much current your device draws.
Background reading
The wider questions behind these two codes.