| CR2032 | CR2025 |
|---|---|
| 20.0 mm × 3.2 mm | 20.0 mm × 2.5 mm |
| 3 V lithium | 3 V lithium |
| ~225 mAh capacity | ~165 mAh capacity |
| Same diameter as CR2025 | Same diameter as CR2032 |
Can I replace a CR2025 with a CR2032? Not automatically. Both are 20 mm in diameter and 3 V lithium, but a CR2032 is 3.2 mm thick versus 2.5 mm for a CR2025. In a compartment sized for a CR2025, a CR2032 is often too thick to seat properly or close the battery door. Always match the code printed on the old cell, or the size stated in the device manual.
Buying in Singapore? After confirming which size you need, shop our CR2032 coin cell battery listing, or browse the full range on our Coin Cell Batteries page.
CR2032 vs CR2025: key differences
CR2032 and CR2025 are both 3 V lithium coin cells with the same 20 mm diameter, but they are not interchangeable because of their different thickness. CR2032 is the thicker of the two at 3.2 mm and has a higher nominal capacity of around 225 mAh, making it the more common size for car key fobs, remote controls, motherboard CMOS backup, and Apple AirTag (1st and 2nd generation). CR2025 is thinner at 2.5 mm with a lower capacity of around 165 mAh, and is typically found in slimmer devices such as calculators, small remotes, and some watches. If you're not sure whether your device takes a lithium coin cell or an alkaline button cell in the first place, see our guide: Alkaline vs Lithium Coin Cell: What's the Difference?
Common uses for each size
| Battery | Typical devices | Size |
|---|---|---|
| CR2032 | Car key fobs, remotes, motherboard CMOS, AirTag, glucose meters | 20.0 mm × 3.2 mm |
| CR2025 | Calculators, slim remotes, some watches, fitness trackers | 20.0 mm × 2.5 mm |
Because both cells share the same 20 mm diameter, it can be tempting to assume they're interchangeable. In practice, the 0.7 mm difference in thickness is enough to prevent a proper fit in either direction: a CR2032 is often too thick for a CR2025 compartment, and a CR2025 in a CR2032 compartment may sit loosely and lose contact with the terminals over time, causing intermittent power or a device that stops working when jostled.
How to choose the correct coin cell
- Read the code stamped on the old battery.
- Check the device manual or battery-compartment marking.
- Match both diameter and thickness — not just the diameter.
- Do not force a thicker cell into a slimmer compartment.
You can select CR2032 in 1, 2, 5, 10 or 20-piece packs from our CR2032 coin cell battery listing, or browse the full range on our Coin Cell Batteries page. For the full cross-reference of button and coin cell codes, see our button battery cross-reference guide.
Frequently asked questions
Are CR2032 and CR2025 interchangeable?
No. They share the same 20 mm diameter and 3 V lithium chemistry, but CR2032 is 3.2 mm thick while CR2025 is 2.5 mm thick. Use the battery size specified by your device.
Can I use a CR2032 instead of a CR2025?
Not automatically. A CR2032 is thicker and may not fit a compartment sized for a CR2025, or may prevent the battery cover from closing properly.
Can I use a CR2025 instead of a CR2032?
Not recommended. A CR2025 is thinner and may sit loosely in a CR2032 compartment, leading to poor contact and intermittent power.
What is the difference between CR2032 and CR2025?
Both are 3 V lithium coin cells with the same 20 mm diameter, but CR2032 is 3.2 mm thick with roughly 225 mAh capacity, while CR2025 is 2.5 mm thick with roughly 165 mAh capacity.
Does CR2032 work in Apple AirTag (1st and 2nd gen)?
Yes — both AirTag generations use one CR2032 cell.
Which is bigger, CR2032 or CR2025?
They have the same diameter. CR2032 is thicker (3.2 mm) than CR2025 (2.5 mm).
Are these batteries rechargeable?
No. Both CR2032 and CR2025 are single-use, non-rechargeable lithium coin cells.
Related battery guides: LR44 vs LR54 batteries, alkaline vs lithium coin cells, and button battery cross-reference guide.