Something wrong or missing? Tell us
| SR42 | MR42 | |
|---|---|---|
| Size | About as wide as a shirt button | About as wide as a shirt button Same |
| Thickness | As thick as 5 credit cards stacked | As thick as 5 credit cards stacked Same |
| Power | 1.55 volts | 1.4 volts |
| Kind | Watch battery | Button battery |
Lasts longer: SR42 (about 25% longer)
As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.
Buttons open amazon.com 🇺🇸, picked from your country.
No. They give different amounts of power (1.55 volts vs 1.4 volts). The wrong one can damage your device or simply won’t work.
No. They give different amounts of power (1.55 volts vs 1.4 volts). The wrong one can damage your device or simply won’t work.
SR42 (about 25% longer).
| SR42 | MR42 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 3.6 mm | 3.6 mm |
| Nominal voltage | 1.55V | 1.4V |
| Typical capacity | 100 mAh | 80 mAh |
| Chemistry | Silver oxide | Mercury oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |