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| SR421SW | SR416SW | |
|---|---|---|
| Size | About as wide as a pencil eraser | About as wide as a pencil eraser Same |
| Thickness | As thick as 3 credit cards stacked | As thick as 2 credit cards stacked |
| Power | 1.55 volts | 1.55 volts Same |
| Kind | Watch battery | Watch battery |
Lasts longer: SR421SW (about 50% longer)
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In a pinch. They’re the same width and power, but SR416SW is thinner. It may wobble a little and runs out about 33% sooner. SR421SW is too thick to fit where SR416SW goes.
No. They’re the same width and power, but SR416SW is thinner. It may wobble a little and runs out about 33% sooner. SR421SW is too thick to fit where SR416SW goes.
SR421SW (about 50% longer).
| SR421SW | SR416SW | |
|---|---|---|
| Diameter | 4.8 mm | 4.8 mm |
| Height | 2.2 mm | 1.7 mm |
| Nominal voltage | 1.55V | 1.55V |
| Typical capacity | 12 mAh | 8 mAh |
| Chemistry | Silver oxide | Silver oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |