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CR2450 vs CR2032 battery
No. CR2450 is 24.5 × 5 mm and CR2032 is 20 × 3.2 mm. Both are 3 V lithium coins, but the diameters are 4.5 mm apart, so neither fits the other's holder.
CR2450 → CR2032
Different diameter: do not swap
A smaller cell can miss the contacts. A larger one will not fit.
The difference in numbers
| CR2450 | CR2032 | Difference | |
|---|---|---|---|
| Diameter, mm | 24.5 | 20.0 | -4.5 mm |
| Height, mm | 5.0 | 3.2 | -1.8 mm |
| Nominal voltage | 3 V | 3 V | same |
| Chemistry | Lithium manganese dioxide coin | Lithium manganese dioxide coin | same family |
| Capacity on the cited sheets | 620 mAh (Panasonic) and 620 mAh (Energizer) and 540 mAh (Renata) | 225 mAh (Panasonic) and 235 mAh (Energizer) | brand ratings, not one test |
What the numbers mean
Both are 3 V lithium manganese dioxide coins, and that is where the likeness ends. CR2450 is 24.5 mm across and 5.0 mm thick. CR2032 is 20 mm across and 3.2 mm thick. The bigger can holds more: 620 mAh (Panasonic) and 620 mAh (Energizer) and 540 mAh (Renata) for CR2450 against 225 mAh (Panasonic) and 235 mAh (Energizer) for CR2032 on the cited sheets.
A CR2032 in a CR2450 holder is 4.5 mm narrower and can miss the contacts, and a CR2450 will not enter a CR2032 slot at all. Spacers and adapters are not part of any datasheet used here. If the device says CR2450, buy CR2450. CR2430 shares the 24.5 mm diameter but is 3.0 mm thick, so it is not a substitute either.
Other codes printed for CR2450: DL2450, 5029LC. For CR2032: DL2032, KECR2032, 5004LC.
Both cells at real size
Lay the old cell on the outlines. CR2450 is the solid shape, CR2032 the dashed one, at 1:1 once the screen is calibrated.
Left: top outlines on one centre. Right: side outlines on one baseline. Drawn from the figures in the table, not a photograph.
Calibrate this screen
Screens scale pages differently, so true size is only true after calibration. Hold a bank card or ID card (85.60 mm wide, ISO/IEC 7810 ID-1) against the bar and slide until the bar is exactly as wide as the card.
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When printing, set scale to 100% or Actual size, not Fit to page.
Open CR2450Open CR2032Compare other codes
More side-by-side pages: CR2025 vs CR2032 · LR44 vs 357 · 377 vs 376 · CR2032 vs CR2016. All codes in one table: battery equivalent chart.
Sources
- Panasonic coin-type lithium batteries lineup, September 2022 Panasonic Energy, checked 2026-10-29
- Panasonic industrial battery catalog (model-number example and BR series title) Panasonic Energy, checked 2026-10-29
- Energizer CR2450 product datasheet (cr2450.pdf) Energizer, checked 2026-10-29
- Renata scope of supply, consumer, part no. ZW9843, version 07.2016 Renata SA, checked 2026-10-29
- Energizer CR2032 product datasheet (cr2032.pdf) Energizer, checked 2026-10-29