CR2032 battery size
20 × 3.2 mm
3 V · Lithium · Coin cell · also sold as DL2032, BR2032, ECR2032
About the CR2032
The most common lithium coin cell: motherboards, car keys, bathroom scales, LED tea lights. It is the one to check first when a computer forgets the date. Around 225 mAh, and it holds its charge for a decade on the shelf.
The numbers
| Diameter | 20 mm · 0.79 in |
| Thickness | 3.2 mm · 0.13 in |
| Nominal voltage | 3 V |
| Chemistry | Lithium |
| Other names | DL2032, BR2032, ECR2032 |
Same diameter, different thickness
These are the cells most often confused with a CR2032, because they are exactly as wide and only differ in one dimension.
| Cell | Diameter | Thickness | vs CR2032 |
|---|---|---|---|
| CR2025 | 20 mm | 2.5 mm | -0.7 mm |
| CR2016 | 20 mm | 1.6 mm | -1.6 mm |
Other coin cell sizes
| Cell | Size | Voltage |
|---|---|---|
| CR2025 | 20 × 2.5 mm | 3 V |
| CR2016 | 20 × 1.6 mm | 3 V |
| CR2450 | 24 × 5 mm | 3 V |
| CR1220 | 12 × 2 mm | 3 V |
| CR1620 | 16 × 2 mm | 3 V |
| CR1632 | 16 × 3.2 mm | 3 V |
| LR44 | 11.6 × 5.4 mm | 1.5 V |
| LR41 | 7.9 × 3.6 mm | 1.5 V |
| LR1130 | 11.6 × 3.1 mm | 1.5 V |
Frequently asked questions
What size is a CR2032 battery?
20 mm across and 3.2 mm thick — 0.79 × 0.13 inches.
What voltage is a CR2032?
3 V (Lithium).
What do the numbers in CR2032 mean?
They are the size. 20 is the diameter in millimetres and 32 is the thickness in tenths of a millimetre — so CR2032 is 20 mm by 3.2 mm. The rule holds for every coin cell and every lithium-ion cylinder named this way.
Can I use a CR2025 instead of a CR2032?
They are the same diameter, 20 mm, and different thicknesses: 3.2 mm against 2.5. A CR2025 is thinner, so it may rattle or lose contact, and it holds less. Same voltage, so nothing is damaged by trying.