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LR44 vs CR2032
LR44 and CR2032 are not interchangeable. They differ in voltage (1.5 V vs 3 V), diameter (11.6 mm vs 20 mm), thickness (5.4 mm vs 3.2 mm), chemistry (alkaline button cell vs lithium coin cell). The CR2032 holds about 1.9× the energy of the LR44 (225 mAh vs 120 mAh).
| LR44 | CR2032 | |
|---|---|---|
| Type | alkaline button cell | lithium coin cell |
| Voltage | 1.5 V | 3 V |
| Size | 11.6 mm × 5.4 mm | 20 mm × 3.2 mm |
| Typical capacity | ≈ 120 mAh | ≈ 225 mAh |
| Rechargeable | no | no |
| Other codes | AG13, A76, L1154, 357 | DL2032, ECR2032, BR2032, 5004LC |
Can I use CR2032 instead of LR44?
No. Wrong voltage: 3 V vs 1.5 V.
Can I use LR44 instead of CR2032?
No. Wrong voltage: 1.5 V vs 3 V.
Where each one is used
LR44: toys and games; calculators; laser pointers; digital calipers.
CR2032: most modern car key fobs; Apple AirTag and other Bluetooth trackers; computer motherboard (CMOS / BIOS clock) battery; bathroom and kitchen scales.
Both sizes turn up in calculators, depending on the model, which is why people mix them up: check the code on the old cell.