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| Size 13 | LR721 | |
|---|---|---|
| Size | About as wide as a pea | About as wide as a pea Same |
| Thickness | As thick as 7 credit cards stacked | As thick as 3 credit cards stacked |
| Power | 1.45 volts | 1.5 volts |
| Kind | Hearing aid battery | Button battery |
Lasts longer: Size 13 (about 1567% 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 13 (about 1567% longer).
| Size 13 | LR721 | |
|---|---|---|
| Diameter | 7.9 mm | 7.9 mm |
| Height | 5.4 mm | 2.1 mm |
| Nominal voltage | 1.45V | 1.5V |
| Typical capacity | 300 mAh | 18 mAh |
| Chemistry | Zinc-air | Alkaline |
| Shelf life | 3 yrs | 5 yrs |
| Operating temp | 0 to 50 °C | -10 to 60 °C |