CR2040 Battery Equivalent
CR2040 is sold under that code alone in this chart; no other cell here is 20 × 4 mm at 3 V.
- Chemistry
- lithium (Li-MnO2)
- Voltage
- 3 V
- Size (Ø × H)
- 20 × 4 mm
- Typical capacity
- 280 mAh
CR2040 equivalents
Similar size, check the fit
Same diameter, different thickness. These are not drop-in replacements.
| Cell | Size | Verdict |
|---|---|---|
| CR2012 | 20 × 1.2 mm | Same 20 mm diameter, but 1.2 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact. |
| CR2016 | 20 × 1.6 mm | Same 20 mm diameter, but 1.6 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact. |
| CR2020 | 20 × 2 mm | Same 20 mm diameter, but 2 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact. |
| CR2025 | 20 × 2.5 mm | Same 20 mm diameter, but 2.5 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact. |
| CR2032 | 20 × 3.2 mm | Same 20 mm diameter, but 3.2 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact. |
| CR2050 | 20 × 5 mm | Same 20 mm diameter, but 5 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact. |
Do not use
These are the same size or a similar code, and they are not equivalents.
-
LIR2040
Rechargeable Li-ion: 3.6-4.2 V and far less capacity; only for devices built for it.
About the CR2040 cell
Used in Skytronic PRO Audible Altimeter but also flow meters and organizers (as a memory backup battery). Has become obsolete and hard to find. Other names are DL2040, ECR2040, E-CR2040, KCR2040, KECR2040, KL2040, L2040, L24.
CR2040 questions
- Will CR2012 work in place of CR2040?
- Same 20 mm diameter, but 1.2 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact.
- Will CR2016 work in place of CR2040?
- Same 20 mm diameter, but 1.6 mm tall instead of 4 mm. Only if the holder fits; thinner cells can lose contact.
- Can I use LIR2040 instead of CR2040?
- No. Rechargeable Li-ion: 3.6-4.2 V and far less capacity; only for devices built for it.
- What voltage is CR2040?
- CR2040 is a 3 V lithium cell with a typical capacity of 280 mAh.
- What size is CR2040?
- 20 mm across and 4 mm thick.