Something wrong or missing? Tell us
| Size 675 | MR42 | |
|---|---|---|
| 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 | 1.4 volts |
| Kind | Hearing aid battery | Button battery |
Lasts longer: Size 675 (about 675% longer)
As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.
Buttons open amazon.com 🇺🇸, picked from your country.
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 675% longer).
| Size 675 | MR42 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 3.6 mm |
| Nominal voltage | 1.45V | 1.4V |
| Typical capacity | 620 mAh | 80 mAh |
| Chemistry | Zinc-air | Mercury oxide |
| Shelf life | 3 yrs | 5 yrs |
| Operating temp | 0 to 50 °C | -10 to 60 °C |