LR44 vs 357 — What Is the Difference?
| LR44 | 357 | |
|---|---|---|
| Voltage | 1.5V | 1.55V |
| Diameter | 11.6mm | 11.6mm |
| Thickness | 5.4mm | 5.4mm |
| Capacity | ~150mAh | ~190mAh |
| Chemistry | Alkaline | Silver Oxide |
| Common uses | calculators, thermometers, toys, LED lights, general electronics | watches, cameras, medical devices, precision instruments |
Are they interchangeable?
Yes — interchangeableYes, physically. They are the same size and will fit in the same devices. However, 357 is silver oxide (1.55V) while LR44 is alkaline (1.5V). The 357 holds a more stable voltage throughout its life and lasts longer, making it better for watches and precision instruments. LR44 is cheaper and perfectly fine for toys, calculators, and general electronics.
The verdict
For watches and medical devices, use 357 (silver oxide) for better performance. For everything else, LR44 (alkaline) is fine and costs less. Both will physically work in any device that takes either.
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