CR2025 vs CR2016

Two 20 mm 3 V lithium coin cells separated by 0.9 mm of thickness: 2.5 mm against 1.6 mm, and about 70% more capacity.

Quick answer

Same width and same 3 volts. The CR2025 is about a millimetre thicker and lasts roughly 70% longer. Use whichever your device specifies — a CR2016 in a CR2025 slot has a real chance of losing contact, and a CR2025 will not fit where the space is cut for a CR2016.

Verdict:: CR2025 where it fits, CR2016 only where it must
Interchangeable:: sometimes — check the fit

Side-by-side specifications

CR2025 compared with CR2016
Specification	CR2025	CR2016
Chemistry	Lithium	Lithium
Type	Coin Cell	Coin Cell
Nominal voltage	3 V	3 V
Diameter	20 mm	20 mm
Height	2.5 mm	1.6 mm
Typical capacity	150–170 mAh	85–100 mAh
Rechargeable	No	No
Also sold as	DL2025, BR2025	DL2016, BR2016

Size comparison

CR2025

Ø 20 mm · H 2.5 mm

CR2016

Ø 20 mm · H 1.6 mm

Both are 20 mm across, so only thickness separates them: CR2016 at 1.6 mm against CR2025 at 2.5 mm.

Thickness

2.5 mm against 1.6 mm. Under a millimetre apart, which is exactly why they get confused at the till — the codes, not the cells, are what tell them apart.

Runtime

150–170 mAh against 85–100 mAh. The CR2025 runs roughly 70% longer in the same device.

Reading the code

The last two digits are the thickness in tenths of a millimetre: 2025 is 2.5 mm, 2016 is 1.6 mm. The first two are the diameter, 20 mm for both.

Can I use a CR2016 instead of a CR2025?

It depends which way round. Both cells are 20 mm across, so the only difference is thickness. The thinner CR2016 will usually drop into a holder built for the CR2025, but it can sit low and lose contact with the sprung terminal. The reverse does not work: a 2.5 mm CR2025 will not fit a compartment cut for a 1.6 mm CR2016, and forcing it risks bending the contact or the cover.

CR2025 specs →CR2016 specs →

Check before you swap. Batteries with similar dimensions are not always interchangeable. Always verify voltage, chemistry and the requirements printed in your device manual before fitting a replacement.

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