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| SR41 | SR721SW | |
|---|---|---|
| Size | About as wide as a pea | About as wide as a pea Same |
| Thickness | As thick as 5 credit cards stacked | As thick as 3 credit cards stacked |
| Power | 1.55 volts | 1.55 volts Same |
| Kind | Watch battery | Watch battery |
Lasts longer: SR41 (about 80% longer)
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In a pinch. They’re the same width and power, but SR721SW is thinner. It may wobble a little and runs out about 44% sooner. SR41 is too thick to fit where SR721SW goes.
No. They’re the same width and power, but SR721SW is thinner. It may wobble a little and runs out about 44% sooner. SR41 is too thick to fit where SR721SW goes.
SR41 (about 80% longer).
| SR41 | SR721SW | |
|---|---|---|
| Diameter | 7.9 mm | 7.9 mm |
| Height | 3.6 mm | 2.1 mm |
| Nominal voltage | 1.55V | 1.55V |
| Typical capacity | 45 mAh | 25 mAh |
| Chemistry | Silver oxide | Silver oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |