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| LR921 | SR936W | |
|---|---|---|
| Size | About as wide as a pea | About as wide as a pea Same |
| Thickness | As thick as 3 credit cards stacked | As thick as 5 credit cards stacked |
| Power | 1.5 volts | 1.55 volts |
| Kind | Button battery | Watch battery |
Lasts longer: SR936W (about 150% longer)
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No. They’re the same width and power, but LR921 is thinner. It may wobble a little and runs out about 60% sooner. SR936W is too thick to fit where LR921 goes.
In a pinch. They’re the same width and power, but LR921 is thinner. It may wobble a little and runs out about 60% sooner. SR936W is too thick to fit where LR921 goes.
SR936W (about 150% longer).
| LR921 | SR936W | |
|---|---|---|
| Diameter | 9.5 mm | 9.5 mm |
| Height | 2.1 mm | 3.6 mm |
| Nominal voltage | 1.5V | 1.55V |
| Typical capacity | 30 mAh | 75 mAh |
| Chemistry | Alkaline | Silver oxide |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |