Is CR1632 the same as DL1632?

Yes. DL1632 is Duracell's name for the CR1632 and ECR1632 is Energizer's. All three are 16 × 3.2 mm lithium cells at 3 volts. A BR1632 is the same size with a different lithium chemistry and delivers less current.

Can I use a CR1620 instead of a CR1632?

No. Both are 16 mm across, but the CR1620 is 2 mm thick and the CR1632 is 3.2 mm. A thinner cell won't press against the contacts, so the watch won't run reliably.

How long does a CR1632 battery last?

It holds about 125–140 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.

CR1632 battery equivalents

The CR1632 is a 16 × 3.2 mm 3-volt lithium cell, used in car key fobs and small electronics. It's sold under several names: DL1632, ECR1632, BR1632.

CR1632 (16 × 3.2 mm) from the top and the side, to scale with a US dime (17.9 mm).

Equivalents

Sold as	Type	In a watch
CR1632, DL1632, ECR1632	Lithium manganese dioxide, 3 V	Same battery under brand prefixes
BR1632	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 16 mm across, so they look right in the pack, but the thickness is different. They aren't substitutes.

Getting a CR1632 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 CR1632 the same as DL1632?: Yes. DL1632 is Duracell's name for the CR1632 and ECR1632 is Energizer's. All three are 16 × 3.2 mm lithium cells at 3 volts. A BR1632 is the same size with a different lithium chemistry and delivers less current.
Can I use a CR1620 instead of a CR1632?: No. Both are 16 mm across, but the CR1620 is 2 mm thick and the CR1632 is 3.2 mm. A thinner cell won't press against the contacts, so the watch won't run reliably.
How long does a CR1632 battery last?: It holds about 125–140 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.