CR2032 vs CR2430

Almost the same thickness — 3.2 mm against 3.0 mm — but the CR2430 is 24.5 mm across against 20 mm, so the two never interchange.

Quick answer

Not interchangeable, and this pair catches people out. The two cells are almost the same thickness (3.2 mm against 3.0 mm), so they feel alike in the hand — but the CR2430 is 4.5 mm wider. It will not drop into a CR2032 holder, and a CR2032 is too small to reach the contacts in a CR2430 one. The CR2430 does hold about 25% more power.

Verdict:: No — near-identical thickness, wrong diameter
Interchangeable:: no

Side-by-side specifications

CR2032 compared with CR2430
Specification	CR2032	CR2430
Chemistry	Lithium	Lithium
Type	Coin Cell	Coin Cell
Nominal voltage	3 V	3 V
Diameter	20 mm	24.5 mm
Height	3.2 mm	3 mm
Typical capacity	210–240 mAh	270–300 mAh
Rechargeable	No	No
Also sold as	DL2032, BR2032, ECR2032	DL2430, BR2430, ECR2430

Size comparison

CR2032

Ø 20 mm · H 3.2 mm

CR2430

Ø 24.5 mm · H 3 mm

These cells do not share a footprint, so one will not sit correctly in the other's compartment.

Why it misleads

Thickness is what people check by eye, and these two are within 0.2 mm of each other. Diameter is what decides the fit, and there they are 4.5 mm apart.

Runtime

270–300 mAh for the CR2430 against 210–240 mAh for the CR2032 — the wider cell holds roughly a quarter more despite being marginally thinner.

Check the first two digits

20 versus 24. Reading only the last two digits of a coin cell code is how this swap gets attempted in the first place.

Can I use a CR2430 instead of a CR2032?

Not directly. The CR2430 measures 24.5 × 3 mm against 20 × 3.2 mm for the CR2032, so it will not seat properly in the same compartment.

CR2032 specs →CR2430 specs →

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.

Related comparisons

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