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| SR721SW | SR58 | |
|---|---|---|
| Size | About as wide as a pea | About as wide as a pea Same |
| Thickness | As thick as 3 credit cards stacked | As thick as 3 credit cards stacked Same |
| Power | 1.55 volts | 1.55 volts Same |
| Kind | Watch battery | Watch battery |
Lasts longer: Same
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Yes. SR721SW and SR58 are two names for the exact same battery. Use either one.
Yes. SR721SW and SR58 are two names for the exact same battery. Use either one.
They last about the same.
| SR721SW | SR58 | |
|---|---|---|
| Diameter | 7.9 mm | 7.9 mm |
| Height | 2.1 mm | 2.1 mm |
| Nominal voltage | 1.55V | 1.55V |
| Typical capacity | 25 mAh | 25 mAh |
| Chemistry | Silver oxide | Silver oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |