Something wrong or missing? Tell us
| SR521SW | Size 5 | |
|---|---|---|
| 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 3 credit cards stacked |
| Power | 1.55 volts | 1.45 volts |
| Kind | Watch battery | Hearing aid battery |
Lasts longer: Size 5 (about 136% 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 5 (about 136% longer).
| SR521SW | Size 5 | |
|---|---|---|
| Diameter | 5.8 mm | 5.8 mm |
| Height | 2.1 mm | 2.5 mm |
| Nominal voltage | 1.55V | 1.45V |
| Typical capacity | 14 mAh | 33 mAh |
| Chemistry | Silver oxide | Zinc-air |
| Shelf life | 5 yrs | 3 yrs |
| Operating temp | -10 to 60 °C | 0 to 50 °C |