Is CR2430 the same as DL2430?

Yes. DL2430 is Duracell's name for the CR2430 and ECR2430 is Energizer's. All three are 24.5 × 3 mm lithium cells at 3 volts. A BR2430 is the same size with a different lithium chemistry and delivers less current.

Can I use a CR2450 instead of a CR2430?

No. Both are 24.5 mm across, but the CR2450 is 5 mm thick and the CR2430 is 3 mm. A thicker cell won't let the caseback or holder close, so the watch won't run reliably.

How long does a CR2430 battery last?

It holds about 270–300 mAh. In a digital watch that's usually two to five years, less with heavy use of the light or alarm. Lithium coin cells keep for up to ten years unused.

CR2430 battery equivalents

The CR2430 is a 24.5 × 3 mm 3-volt lithium cell, used in key fobs, bike lights and some larger digital watches. It's sold under several names: DL2430, ECR2430, BR2430.

CR2430 (24.5 × 3 mm) from the top and the side, to scale with a US dime (17.9 mm).

Equivalents

Sold as	Type	In a watch
CR2430, DL2430, ECR2430	Lithium manganese dioxide, 3 V	Same battery under brand prefixes
BR2430	Lithium carbon monofluoride, 3 V	Fits; lower current, so it can struggle with a backlight or alarm

Look-alikes that won't fit

These are also 24.5 mm across, so they look right in the pack, but the thickness is different. They aren't substitutes.

CR2450 5 mm thick (+2 mm)

Getting a CR2430 changed

Watch shops in our directory list battery changes from $4.99 to $115, with a median of $15, usually done while you wait. A shop has the tools to open a screw-down caseback without marking it, and can replace the gasket and pressure-test a water-resistant watch. 455 shops in the directory list battery replacement. To do it yourself, follow how to change a watch battery.

Find the closest shops to you. Your location stays in your browser.

Questions

Is CR2430 the same as DL2430?: Yes. DL2430 is Duracell's name for the CR2430 and ECR2430 is Energizer's. All three are 24.5 × 3 mm lithium cells at 3 volts. A BR2430 is the same size with a different lithium chemistry and delivers less current.
Can I use a CR2450 instead of a CR2430?: No. Both are 24.5 mm across, but the CR2450 is 5 mm thick and the CR2430 is 3 mm. A thicker cell won't let the caseback or holder close, so the watch won't run reliably.
How long does a CR2430 battery last?: It holds about 270–300 mAh. In a digital watch that's usually two to five years, less with heavy use of the light or alarm. Lithium coin cells keep for up to ten years unused.