Is CR1620 the same as DL1620?

Yes. DL1620 is Duracell's name for the CR1620 and ECR1620 is Energizer's. All three are 16 × 2 mm lithium cells at 3 volts. A BR1620 is the same size with a different lithium chemistry and delivers less current.

Can I use a CR1616 instead of a CR1620?

No. Both are 16 mm across, but the CR1616 is 1.6 mm thick and the CR1620 is 2 mm. A thinner cell won't press against the contacts, so the watch won't run reliably.

How long does a CR1620 battery last?

It holds about 70–80 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.

CR1620 battery equivalents

The CR1620 is a 16 × 2 mm 3-volt lithium cell, used in digital watches and car key fobs. It's sold under several names: DL1620, ECR1620, BR1620.

CR1620 (16 × 2 mm) from the top and the side, to scale with a US dime (17.9 mm).

Equivalents

Sold as	Type	In a watch
CR1620, DL1620, ECR1620	Lithium manganese dioxide, 3 V	Same battery under brand prefixes
BR1620	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 CR1620 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 CR1620 the same as DL1620?: Yes. DL1620 is Duracell's name for the CR1620 and ECR1620 is Energizer's. All three are 16 × 2 mm lithium cells at 3 volts. A BR1620 is the same size with a different lithium chemistry and delivers less current.
Can I use a CR1616 instead of a CR1620?: No. Both are 16 mm across, but the CR1616 is 1.6 mm thick and the CR1620 is 2 mm. A thinner cell won't press against the contacts, so the watch won't run reliably.
How long does a CR1620 battery last?: It holds about 70–80 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.