CR1632 vs CR2032
CR1632 is a 16 × 3.2 mm lithium coin; CR2032 is 20 × 3.2 mm. Same height family, different diameter — a frequent mix-up at checkout because both end in “32”.
Last verified Aug 25, 2026
Never interchangeable — verify 16 mm vs 20 mm on the old battery.
A CR2032 vs CR1632 swap fails on diameter, capacity. If the door only closes when you force it, or the device works only while you press the cover, you have the wrong cell — not a weak spring you should ignore.
They share 3 V and LiMnO2, which is why CR1632 vs CR2032 looks interchangeable on a store shelf. Highlighted rows are the ones that change the purchase: diameter, capacity.
Read physical fit before capacity. Extra milliamp-hours only help when the holder is built for that cell. A “better” spec in the wrong tray is a mechanical or voltage mismatch, not an upgrade.
| Spec | CR1632 | CR2032 |
|---|---|---|
| Chemistry | LiMnO2 | LiMnO2 |
| Nominal voltage | 3 V | 3 V |
| Diameter | 16 mm | 20 mm |
| Thickness | 3.2 mm | 3.2 mm |
| Outline | 16 × 3.2 mm | 20 × 3.2 mm |
| Typical capacity | 130–140 mAh | 220–240 mAh |
| Typical energy | — | 0.66–0.72 Wh |
| Typical weight | — | 3.1 g |
| Fresh open-circuit voltage | — | 3.2–3.4 V |
| Unused shelf life | — | ~10 years |
| Category | lithium-coin | lithium-coin |
| Common aliases | DL1632, ECR1632 | DL2032, ECR2032 |
If you searched CR2032 vs CR1632, you are on the same comparison with the names reversed. The difference between CR1632 and CR2032 batteries is not the word “vs” — it is the specs that do not match after you ignore the similar photos.
CR1632 is 16 mm across; CR2032 is 20 mm. That gap is enough for one cell to miss the clip entirely or rattle in the other tray. IEC codes put diameter in the first digits for a reason: you cannot sand a coin cell down to fit.
Typical CR1632 capacity is 130–140 mAh. CR2032 is 220–240 mAh. Runtime only follows that gap inside the correct holder. Extra capacity in the wrong tray does not last longer — it often does not run at all.
Height is similar (~3.2 mm) — that is why they look related on paper
CR1632 will rattle or miss contacts in a CR2032 holder
CR2032 will not fit a 16 mm tray
Coin and button codes are rulers, not brand slogans. The letters mark chemistry class. The digits encode size. CR1632 measures 16 × 3.2 mm; CR2032 measures 20 × 3.2 mm. Once you read the code that way, CR2032 vs CR1632 stops looking like a preference and starts looking like a fit check.
Usually no. CR1632 is 16 × 3.2 mm at 3 V (LiMnO2). CR2032 is 20 × 3.2 mm at 3 V (LiMnO2). Those are not the same part.
If the spent cell or tray said CR2032, specify that code. Forcing CR1632 can crack a cover, lose contact, or apply the wrong voltage.
Usually no. Going the other way does not fix a diameter, thickness, or voltage miss. CR2032 in a CR1632 holder has the same problem with the names flipped.
If you arrived from a CR2032 vs CR1632 search, stay on this page. The answer does not change.
Retail packs hide the IEC size behind house codes. CR1632 also appears as DL1632, ECR1632. CR2032 also appears as DL2032, ECR2032. Those prefixes do not change the outline unless the chemistry letters change (BR, LIR, ML, PR).
You do not need a full datasheet to settle CR1632 vs CR2032. You need the stamp, the tray, or a cheap pair of calipers. A store bin labeled only “button cell” or “3V lithium” will not do that work for you.
Read the first two digits of the IEC code: they encode diameter. 16 vs 20 is not a brand difference.
Do not stack cells, grind a can, or use foil as a permanent spacer to fake CR2032 with CR1632. Read the stamp, then the spec table. If the door will not close without force, you have the wrong height or diameter.
Return or re-order the 16 mm cell. Do not grind or force the larger cell into the fob.
Yes. CR1632 vs CR2032 and CR2032 vs CR1632 are the same pair. Fit, voltage, and chemistry do not change when you flip the order.
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.
