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| PR43 | MR42 | |
|---|---|---|
| Size | About as wide as a shirt button | About as wide as a shirt button Same |
| Thickness | As thick as 6 credit cards stacked | As thick as 5 credit cards stacked |
| Power | 1.45 volts | 1.4 volts |
| Kind | Hearing aid battery | Button battery |
Lasts longer: PR43 (about 388% 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 388% longer).
| PR43 | MR42 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 4.2 mm | 3.6 mm |
| Nominal voltage | 1.45V | 1.4V |
| Typical capacity | 390 mAh | 80 mAh |
| Chemistry | Zinc-air | Mercury oxide |
| Shelf life | 3 yrs | 5 yrs |
| Operating temp | 0 to 50 °C | -10 to 60 °C |