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| A23 | A21 | |
|---|---|---|
| Size | Short and skinny, about 2.9 cm long | Short and skinny, about 1.6 cm long Same |
| Length | Short and skinny, about 2.9 cm long | Short and skinny, about 1.6 cm long |
| Power | 12 volts | 6 volts |
| Kind | 12-volt remote battery | 6-volt specialty battery |
Lasts longer: Same
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No. They give different amounts of power (12 volts vs 6 volts). The wrong one can damage your device or simply won’t work.
No. They give different amounts of power (12 volts vs 6 volts). The wrong one can damage your device or simply won’t work.
They last about the same.
| A23 | A21 | |
|---|---|---|
| Diameter | 10.3 mm | 10.3 mm |
| Height | 28.5 mm | 16.0 mm |
| Nominal voltage | 12V | 6.0V |
| Typical capacity | 55 mAh | 55 mAh |
| Chemistry | Alkaline (stacked cells) | Alkaline (stacked cells) |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 50 °C | -10 to 50 °C |