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| SR42 | PR43 | |
|---|---|---|
| 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 6 credit cards stacked |
| Power | 1.55 volts | 1.45 volts |
| Kind | Watch battery | Hearing aid battery |
Lasts longer: PR43 (about 290% 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.
PR43 (about 290% longer).
| SR42 | PR43 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 3.6 mm | 4.2 mm |
| Nominal voltage | 1.55V | 1.45V |
| Typical capacity | 100 mAh | 390 mAh |
| Chemistry | Silver oxide | Zinc-air |
| Shelf life | 5 yrs | 3 yrs |
| Operating temp | -10 to 60 °C | 0 to 50 °C |