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| MR44 | 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 | 1.4 volts | 1.4 volts Same |
| Kind | Button battery | Button battery |
Lasts longer: MR44 (about 206% longer)
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In a pinch. They’re the same width and power, but MR42 is thinner. It may wobble a little and runs out about 67% sooner. MR44 is too thick to fit where MR42 goes.
No. They’re the same width and power, but MR42 is thinner. It may wobble a little and runs out about 67% sooner. MR44 is too thick to fit where MR42 goes.
MR44 (about 206% longer).
| MR44 | MR42 | |
|---|---|---|
| Diameter | 11.6 mm | 11.6 mm |
| Height | 5.4 mm | 3.6 mm |
| Nominal voltage | 1.4V | 1.4V |
| Typical capacity | 245 mAh | 80 mAh |
| Chemistry | Mercury oxide | Mercury oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |