CR2025 vs CR2032
A CR2025 vs CR2032 decision looks simple because both cells are 20 mm wide and both are 3 V lithium coins. The difference is height: 2.5 mm versus 3.2 mm. That 0.7 mm decides whether a key-fob door closes, whether the spring keeps pressure, and how long the device runs after you install the right cell.
Last verified Aug 25, 2026
They are not interchangeable for reliable use. Chemistry and voltage match. Diameter matches. Thickness does not. A CR2032 vs CR2025 swap can look fine for a minute on the kitchen table and still fail in a pocket, a hot car, or a laptop that gets closed.
Buy the height printed on the spent cell or on the tray — CR2025 / DL2025 / ECR2025, or CR2032 / DL2032 / ECR2032. “Whichever 3 V lithium is in stock” is how people crack a slim fob or create the intermittent-lock symptom.
Do not wad aluminum foil as a spacer except as a short emergency stopgap, and never leave that setup in a car fob or a child’s gadget. Never stack coin cells. These are 3.0 V primary cells, not 3.7 V rechargeable LIR cells, and they are not hearing-aid or pacemaker batteries.
The difference between CR2025 and CR2032 batteries does not show up in voltage. Both are 3.0 V Li-MnO₂ primaries with a 20 mm footprint, so they sit in the same store bin and photograph almost identically. Highlighted rows are the ones that actually change the purchase: thickness, outline, capacity, energy, weight, and the brand aliases printed on the pack.
Read thickness before capacity. Extra milliamp-hours only help when the holder is built for that height. A thicker CR2032 in a 2.5 mm tray is not a “better battery.” It is a mechanical mismatch.
| Spec | CR2025 | CR2032 |
|---|---|---|
| Chemistry | LiMnO2 | LiMnO2 |
| Nominal voltage | 3 V | 3 V |
| Diameter | 20 mm | 20 mm |
| Thickness | 2.5 mm | 3.2 mm |
| Outline | 20 × 2.5 mm | 20 × 3.2 mm |
| Typical capacity | 160–170 mAh | 220–240 mAh |
| Typical energy | 0.48–0.51 Wh | 0.66–0.72 Wh |
| Typical weight | 2.5 g | 3.1 g |
| Fresh open-circuit voltage | 3.2–3.4 V | 3.2–3.4 V |
| Unused shelf life | ~10 years | ~10 years |
| Category | lithium-coin | lithium-coin |
| Common aliases | DL2025, ECR2025 | DL2032, ECR2032 |
If you searched CR2032 vs CR2025, you are asking the same thickness question with the names reversed. The cells share a family. They do not share a holder. These are the differences that matter after you ignore the matching 20 mm diameter.
IEC naming encodes height in tenths of a millimetre. CR2025 is 2.5 mm; CR2032 is 3.2 mm. The 0.7 mm gap is small in the hand and large inside a spring clip. Coin-cell holders are designed for one stack height. They do not have a “close enough” setting.
A typical CR2032 is about 220–240 mAh. A typical CR2025 is about 160–170 mAh. That is roughly 30–40% more energy in the thicker cell, which is why CR2032 vs CR2025 runtime favors the 2032 when it fits. Put the thinner cell in a 3.2 mm holder and you lose both capacity and contact. Runtime then becomes unpredictable, not merely shorter.
CR2032 packs more electrode material, so it usually weighs about 3.0–3.1 g versus about 2.5 g for CR2025. The larger electrode area also tends to present lower internal resistance and hold voltage better on short pulses — the kind a key fob or Bluetooth tracker draws when it wakes. That is a bonus inside a CR2032 holder, not a reason to force the thicker cell into a slim remote.
The cover sits proud, the latch will not catch, or the plastic bowes. Cheap fobs crack at the hinge. The spring clip can take a permanent bend, so even the correct CR2025 later sits loose. If you have to press hard to close the door, the cell is the wrong height.
The cell rattles. Contact comes and goes when the device moves. Classic symptom: the key fob works only while you squeeze the cover. CMOS clocks reset after a laptop is moved. Trackers drop off after a bump. Clean the contacts first, then confirm you did not install the thinner 2025 by accident.
The letters and digits are a size code, not two marketing names. CR means a lithium-manganese dioxide (Li-MnO₂) primary coin — 3.0 V, single-use. The first two digits are diameter in millimeters. The last two digits are thickness in tenths of a millimeter. Once you can read the code, CR2025 vs CR2032 stops looking like a brand choice and starts looking like a ruler.
Usually no. A CR2032 holder is machined or stamped for 3.2 mm. A 2.5 mm CR2025 slides in easily because the diameter matches, then sits below the spring’s design travel. Contact pressure falls. The device may wake once, then drop out when you shake a keyring, close a laptop lid, or press a fob button.
Even if it “works on the kitchen table,” expect shorter runtime and random cut-outs. You also give up the extra 50–80 mAh the designer counted on. If the old cell said CR2032, DL2032, or ECR2032, buy that height. A foil shim is not a substitute for the missing 0.7 mm.
Usually no. The extra 0.7 mm is enough to keep a slim door from closing, crack a cheap fob, or crush the clip on a thin remote. If the latch only catches when you force it, take the thicker cell out. A bent clip often stays bent, so the next correct CR2025 can sit loose too.
A few deep trays accept either height. That is the exception, not a rule you can assume from “both are 20 mm.” Match the stamp on the spent cell instead of assuming thicker means better. If you arrived here after typing CR2032 vs CR2025, it is the same thickness question with the names reversed.
Retail packs often hide the IEC size behind a house code. DL is Duracell’s common prefix. ECR is Energizer’s. Those prefixes do not change height. A DL2025 is still 2.5 mm. An ECR2032 is still 3.2 mm. Buy the matching height from a fresh name-brand pack; do not treat “lithium 3V” as a size.
BR2025 and BR2032 keep the same outline but use Li-CFx chemistry. They are a high-temperature variant, not a capacity upgrade and not a reason to ignore thickness. LIR2032 and ML2032 are rechargeable look-alikes with different voltage or a charge circuit — they are not part of this CR2025 vs CR2032 swap.
Folding foil on the (+) face can briefly restore contact if you only have a thinner cell. It can also short the can to the wrong spring, migrate after a drop, or leave debris that keeps the next correct cell from sitting flat.
If you must limp a device home, treat foil as a same-day workaround, then buy the correct height. It is not a permanent CR2025-for-CR2032 conversion, and it is a bad idea to leave foil in a car key or anything a child can open.
There is no universal “key fobs take CR2032” rule. Slim fobs and many remotes were designed around a 2.5 mm CR2025. Motherboards, trackers, and most scales were designed around a 3.2 mm CR2032. The tray stamp wins. Use the table as a starting point, then read the spent cell.
| Device | Usual pick | Why |
|---|---|---|
| Car key fob | Match the stamp | Many fobs are CR2032; slim trays are CR2025. Wrong height = intermittent lock/unlock. |
| PC CMOS / BIOS / RTC | CR2032 | Motherboard clips are almost always the 3.2 mm cell. |
| Slim TV / A/C remote | Often CR2025 | If the door will not close on a 2032, you have a 2025 (or CR2016) tray. |
| Credit-card / ultra-thin remote | CR2016 | 1.6 mm — not a CR2025/CR2032 job. See the three-way guide. |
| Bathroom / kitchen scale | Usually CR2032 | Deeper well; thinner 2025 often loses contact under the cover. |
| Item tracker (AirTag-class) | CR2032 | Specified 3.2 mm cell; a 2025 sits loose in the gasket. |
| Calculator / slim thermometer | Often CR2025 | Confirm the printed code; some toys still use CR2032. |
| Fitness strap / small sensor | Read the door | Either height appears; do not upsize for “more mAh.” |
You do not need a datasheet to settle CR2025 vs CR2032. You need the stamp, the tray, or a cheap pair of calipers. Diameter will lie to you because both cells are 20 mm. Height will not.
Read the printed code first. If the ink is gone, measure height with calipers or compare the spent cell against a known CR2025 and CR2032. Diameter will not help you — both are 20 mm. “Almost fits” is not a specification for a coin cell.
Do not stack two thinner cells to fake a CR2032. Stacking doubles voltage or reverses polarity depending on how the cans face each other, and it is a safety mistake, not a capacity trick.
The third common 20 mm height is CR2016 at 1.6 mm. If your tray is shallower than a CR2025, you are not on a CR2025 vs CR2032 problem anymore. Use the three-way height guide before you order.
No for reliable use. They share a 20 mm diameter and 3.0 V Li-MnO₂ chemistry. Thickness is 2.5 mm versus 3.2 mm. That gap is enough to lose spring contact or jam a door. Match the code on the old cell.
Not as a proper replacement. The thinner cell often sits loose, causing drop-outs and shorter runtime. You also lose the extra capacity the device was designed around. Buy CR2032 / DL2032 / ECR2032 if that is what the device lists.
Only if the door closes without force and the latch sits flush. In most slim fobs and remotes the extra 0.7 mm jams the cover or permanently bends the clip. If you have to press to close it, it is the wrong cell.
CR2032, in a holder built for 3.2 mm, because it has more capacity (about 220–240 mAh versus 160–170 mAh). A thicker cell in the wrong tray does not last longer — it may not run at all, or it may crack the case.
Standard CR cells are 3.0 V lithium primaries. Fresh open-circuit voltage is often about 3.2–3.4 V, which is normal and not a rechargeable cell. LIR2032 cells are about 3.6–3.7 V and are a different product class.
Yes for size and chemistry class. DL is Duracell’s prefix; ECR is Energizer’s. The prefix does not change thickness. Buy a fresh name-brand pack of the matching height.
Do not stack coin cells — voltage and polarity go wrong. Foil spacers are an emergency-only contact hack, not a safe conversion. Buy the correct height.
Classic thickness mismatch or a tired spring. A CR2025 in a CR2032 tray is the usual cause. Confirm the printed code and clean the contacts before you replace the whole fob.
CR2016 is the same 20 mm family at 1.6 mm height and much lower capacity. It is not interchangeable with either cell. If the tray is shallower than a CR2025, you need the three-way height guide, not a thicker 2032.
Yes. The two names are the same pair. Thickness, capacity, and fit do not change when you flip the order. This page is the CR2025 vs CR2032 comparison either way.
Use this guide as a starting point, then confirm voltage, chemistry, and physical size with your device manual or the marking on the old cell.
Reviewed by PlainBattery Technical Review Desk on 2026-08-25. Checked: both model identities and dimensions, voltage and chemistry differences, physical fit, interchangeability conclusion and safety warnings.
Revision record: source citations and field-level review scope added September 11, 2026. See our sources and methodology and corrections policy.
