Is CR2016 the same as DL2016?

Yes. DL2016 is Duracell's name for the CR2016 and ECR2016 is Energizer's. All three are 20 × 1.6 mm lithium cells at 3 volts. A BR2016 is the same size with a different lithium chemistry and delivers less current.

Can I use a CR2025 instead of a CR2016?

No. Both are 20 mm across, but the CR2025 is 2.5 mm thick and the CR2016 is 1.6 mm. A thicker cell won't let the caseback or holder close, so the watch won't run reliably.

How long does a CR2016 battery last?

It holds about 75–90 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.

CR2016 battery equivalents

The CR2016 is a 20 × 1.6 mm 3-volt lithium cell, used in digital watches such as the Casio F-91W, and key fobs. It's sold under several names: DL2016, ECR2016, BR2016.

CR2016 (20 × 1.6 mm) from the top and the side, to scale with a US dime (17.9 mm).

Equivalents

Sold as	Type	In a watch
CR2016, DL2016, ECR2016	Lithium manganese dioxide, 3 V	Same battery under brand prefixes
BR2016	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 20 mm across, so they look right in the pack, but the thickness is different. They aren't substitutes.

Getting a CR2016 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 CR2016 the same as DL2016?: Yes. DL2016 is Duracell's name for the CR2016 and ECR2016 is Energizer's. All three are 20 × 1.6 mm lithium cells at 3 volts. A BR2016 is the same size with a different lithium chemistry and delivers less current.
Can I use a CR2025 instead of a CR2016?: No. Both are 20 mm across, but the CR2025 is 2.5 mm thick and the CR2016 is 1.6 mm. A thicker cell won't let the caseback or holder close, so the watch won't run reliably.
How long does a CR2016 battery last?: It holds about 75–90 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.