CR2032 vs CR2025: what's the difference and are they interchangeable?

CR2032 vs CR2025

The CR2032 and CR2025 are both 3 volt lithium coin cells 20 mm across. The difference is thickness: 3.2 mm versus 2.5 mm, which gives the CR2032 about 225 mAh against the CR2025's 165. They swap only when the battery compartment tolerates the height difference.

CR2032 vs CR2025 at the same scale: 20 mm across, 3.2 mm thick against 20 mm across, 2.5 mm thick.

	CR2032	CR2025
Chemistry	Lithium manganese dioxide (Li/MnO2)	Lithium manganese dioxide (Li/MnO2)
Voltage	3 V	3 V
Diameter	20 mm	20 mm
Height	3.2 mm	2.5 mm
Capacity	220-240 mAh	160-170 mAh
Also sold as	DL2032, ECR2032, 5004LC, KCR2032	DL2025, ECR2025, BR2025 (wide-temp variant), 5003LC

The last two digits of each name are the height in tenths of a millimeter, so the CR2032 is 0.7 mm thicker than the CR2025. Electrically they are identical twins: 3 volts nominal, the same lithium manganese dioxide chemistry, the same 20 mm footprint. Devices choose between them purely on available space and desired battery life.

Whether they interchange depends entirely on the holder. Spring-contact compartments in remotes, scales and many key fobs will accept either cell, and fitting the thicker CR2032 where a CR2025 lived buys roughly 40 percent more runtime. Rigid compartments molded to an exact depth are less forgiving: a CR2032 forced into a tight CR2025 slot bends contacts or stops the cover latching, while a CR2025 in a CR2032 holder can sit loose, causing resets and dropouts every time the device is bumped.

If you are standing in a store deciding which to buy, the answer is printed on the battery you removed. When the old cell is missing, check the battery door or manual, and only then fall back on the swap rules. A loose fit can be shimmed for a day with a fold of aluminum foil on the negative side, but treat that strictly as a stopgap; contact pressure and safety both suffer.

Frequently asked questions

Can I use a CR2032 instead of a CR2025?

Yes, if the compartment closes properly over the extra 0.7 mm of thickness. Voltage and diameter match exactly, and you gain about 40 percent capacity. If the door will not latch without force, fit the correct CR2025 instead; bent contacts cause worse problems than a battery change.

Can I use a CR2025 instead of a CR2032?

In an emergency, usually. The thinner cell may sit loose in a 3.2 mm holder, and weak contact makes devices reset or cut out intermittently. It also holds about 25 percent less energy. Replace it with a proper CR2032 when you can.

Which lasts longer, CR2032 or CR2025?

The CR2032, at 220 to 240 mAh versus 160 to 170 for the CR2025. Same chemistry, same voltage, same drain behavior; the thicker cell simply contains more lithium. In an identical device, expect roughly 40 percent more runtime from the CR2032.