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LR44 vs SR44
LR44 and SR44 are interchangeable. They differ in voltage (1.5 V vs 1.55 V), chemistry (alkaline button cell vs silver oxide button cell). The SR44 holds about 1.4× the energy of the LR44 (170 mAh vs 120 mAh).
| LR44 | SR44 | |
|---|---|---|
| Type | alkaline button cell | silver oxide button cell |
| Voltage | 1.5 V | 1.55 V |
| Size | 11.6 mm × 5.4 mm | 11.6 mm × 5.4 mm |
| Typical capacity | ≈ 120 mAh | ≈ 170 mAh |
| Rechargeable | no | no |
| Other codes | AG13, A76, L1154, 357 | 357, 303, AG13, LR44 |
Can I use SR44 instead of LR44?
Yes. Same size; silver oxide lasts longer (an upgrade).
Can I use LR44 instead of SR44?
Yes. Same size; alkaline is cheaper but fades sooner.
Where each one is used
LR44: toys and games; calculators; laser pointers; digital calipers.
SR44: calipers, micrometers and other precision tools; watches and calculators; film cameras and light meters; laser pointers and toys.