CR2450 vs CR2032 — What Is the Difference?
| CR2450 | CR2032 | |
|---|---|---|
| Voltage | 3V | 3V |
| Diameter | 24.5mm | 20mm |
| Thickness | 5mm | 3.2mm |
| Capacity | ~620mAh | ~220mAh |
| Chemistry | Lithium | Lithium |
| Common uses | some BMW key fobs, LED candles, some medical devices | most car key fobs, AirTags, watches, motherboards |
Are they interchangeable?
No — not interchangeableNo. CR2450 is 4.5mm wider and 1.8mm thicker than CR2032. They are completely different physical sizes and will not fit in each other's battery compartments.
The verdict
These are different batteries entirely. CR2450 is used in devices that need more power or longer life. CR2032 is the standard for most key fobs and small electronics. Check your device.
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