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| Size 675 | SR42 | |
|---|---|---|
| Size | About as wide as a shirt button | About as wide as a shirt button Same |
| Thickness | As thick as 7 credit cards stacked | As thick as 5 credit cards stacked |
| Power | 1.45 volts | 1.55 volts |
| Kind | Hearing aid battery | Watch battery |
Lasts longer: Size 675 (about 520% longer)
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No. They’re the same size, but hearing aid batteries breathe air through tiny holes to work. Don’t mix them with ordinary button batteries.
No. They’re the same size, but hearing aid batteries breathe air through tiny holes to work. Don’t mix them with ordinary button batteries.
Size 675 (about 520% longer).
| Size 675 | SR42 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 3.6 mm |
| Nominal voltage | 1.45V | 1.55V |
| Typical capacity | 620 mAh | 100 mAh |
| Chemistry | Zinc-air | Silver oxide |
| Shelf life | 3 yrs | 5 yrs |
| Operating temp | 0 to 50 °C | -10 to 60 °C |