Is CR2450 the same as DL2450?

Yes. DL2450 is Duracell's name for the CR2450 and ECR2450 is Energizer's. All three are 24.5 × 5 mm lithium cells at 3 volts. A BR2450 is the same size with a different lithium chemistry and delivers less current.

Can I use a CR2430 instead of a CR2450?

No. Both are 24.5 mm across, but the CR2430 is 3 mm thick and the CR2450 is 5 mm. A thinner cell won't press against the contacts, so the watch won't run reliably.

How long does a CR2450 battery last?

It holds about 550–620 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.

CR2450 battery equivalents

The CR2450 is a 24.5 × 5 mm 3-volt lithium cell, used in kitchen and bathroom scales, bike computers and some sport watches. It's sold under several names: DL2450, ECR2450, BR2450.

CR2450 (24.5 × 5 mm) from the top and the side, to scale with a US dime (17.9 mm).

Equivalents

Sold as	Type	In a watch
CR2450, DL2450, ECR2450	Lithium manganese dioxide, 3 V	Same battery under brand prefixes
BR2450	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.

CR2430 3 mm thick (-2 mm)

Getting a CR2450 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 CR2450 the same as DL2450?: Yes. DL2450 is Duracell's name for the CR2450 and ECR2450 is Energizer's. All three are 24.5 × 5 mm lithium cells at 3 volts. A BR2450 is the same size with a different lithium chemistry and delivers less current.
Can I use a CR2430 instead of a CR2450?: No. Both are 24.5 mm across, but the CR2430 is 3 mm thick and the CR2450 is 5 mm. A thinner cell won't press against the contacts, so the watch won't run reliably.
How long does a CR2450 battery last?: It holds about 550–620 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.