CR2430 vs CR2450 — What Is the Difference?

CR2430 CR2450
Voltage3V3V
Diameter24.5mm24.5mm
Thickness3mm5mm
Capacity~300mAh~620mAh
ChemistryLithiumLithium
Common usessome car key fobs, watches, remote controlssome BMW key fobs, LED candles, medical devices

Are they interchangeable?

No — not interchangeable

No. Same diameter but CR2450 is 2mm thicker than CR2430, giving it roughly double the capacity. They will not fit in each other's compartments reliably.

The verdict

Use whichever your device specifies. The extra thickness of CR2450 means significantly longer battery life, but it simply will not fit in a CR2430 slot.

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