3 V Li/MnO2 coin
CR2450
BuyCR2450Lithium (CR) · 3 V · 24.5 × 5.0 mm
Safe swap, same cell: DL2450 · 5029LC
Can I use one of these instead?
3 V · 24.5 × 5 mm · Lithium manganese dioxide coin
CR2450 is the 24.5 × 5.0 mm lithium coin. Energizer and Panasonic both rate it at 620 mAh, Energizer's test being to 2.0 V on 7.5 kΩ at 21°C, designation ANSI/NEDA-5029LC, IEC-CR2450. The thicker can is why it shows up in scales, some medical devices, and fobs that were never designed around a 2032. It will not enter a CR2032 slot.
| Chemistry | Lithium manganese dioxide coin |
|---|---|
| Nominal voltage | 3 V |
| Diameter × height | 24.5 × 5 mm Panasonic September 2022 lineup, nominal diameter and height. |
| Designation on the datasheet | ANSI / NEDA-5029LC, IEC-CR2450 |
| Weight | Panasonic about 6.2 g, Energizer 6.8 grams (0.22 oz.) |
Can I substitute it?
Do not substitute CR2032. Diameter and height are both larger. CR2430 is a different height again. Stay with CR2450.
Size check at real size
Lay the old cell on the outline. This shows the top outline (diameter) and the side outline (height) at 1:1 once the screen is calibrated.
CR2450 outline, 24.5 × 5 mm. Not a photograph, drawn from the figures above.
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.
Saved in this browser only.
All cells on one true-size sheet
When printing, set scale to 100% or Actual size, not Fit to page.
Capacity
These are not one test repeated. Capacity varies by brand, load, temperature and cutoff.
| Source | mAh | Test as printed |
|---|---|---|
| Panasonic | 620 | Nominal capacity. Continuous standard drain 0.2 mA. September 2022 lineup. |
| Energizer | 620 | to 2.0 volts; rated at 7.5K ohms at 21°C |
| Renata | 540 | Capacity column of the July 2016 scope chart. |
Cross-reference
Each code is printed on the cited chart. A shared outline is not, by itself, the same cell.
| Where it is printed | Code |
|---|---|
| Duracell | DL2450 |
Devices named on the Energizer guide
Medical devices, key fobs, scales. See car key fobs, medical devices, scales, sports and pet gear.
Lithium manganese dioxide coin cells
A CR coin is a lithium/manganese dioxide primary cell. Panasonic's industrial catalog shows how the number is built: C is that chemistry, R means round, the next two digits are the diameter in millimetres, and the last two are the height in tenths of a millimetre. CR2032 is a 20 mm cell, 3.2 mm thick. CR2025 is the same diameter and 2.5 mm thick. CR2016 is 1.6 mm thick. The voltage does not change with the thickness. Energizer's CR2032 and CR2025 sheets both print a nominal 3.0 V, and Panasonic's standard CR line does too. What changes is how much lithium fits in the can, and whether the cell can reach the contact spring.
That is the whole of the CR2032-versus-CR2025 question. A 2025 will sit in a 2032 holder and rattle. The spring may still touch it on the bench and then drop out in a pocket. A 2032 will not go into a holder machined for 2.5 mm. Do not stack two thinner cells to fake the thickness, and do not add a shim of foil. Match the height printed on the dead cell.
Capacity is a test result, not a property of the four-digit code. Energizer rates its CR2032 at 235 mAh to 2.0 V on a 15 kΩ load at 21°C. Panasonic rates its CR2032 at 225 mAh. Those are both real, and they are not interchangeable as a single 'typical' figure. The page for each size lists the brand ratings we could read off a datasheet. Where a brand is missing, that brand has not been assigned a number here.
Energizer's coin sheets also carry a swallow warning. A lithium coin lodged in the oesophagus can burn through tissue in about two hours. Holders should need a tool, or two deliberate motions, to open. That is a design requirement on the datasheet, not a slogan.
Sources
Last verified 2026-10-29.
- 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