LR44 vs SR44
They are usually the same size, but SR44 uses silver-oxide chemistry and tends to hold voltage more steadily.
Side-by-side specs
| Spec | LR44 | SR44 |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Thickness | 5.4 mm | 5.4 mm |
| Voltage | 1.5V | 1.55V |
| Chemistry | Alkaline | Silver oxide |
| Drain behavior | Drops earlier under load | More stable over discharge |
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Can you substitute one for the other?
Sometimes. Physical fit is usually fine, but precision devices may require SR44 voltage stability.
Physical size comparison (to scale)
Which devices take which
General electronics may accept either. Watches, cameras, and meters often perform better with SR44.