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| SR512SW | LR521 | |
|---|---|---|
| Size | About as wide as a pencil eraser | About as wide as a pencil eraser Same |
| Thickness | As thick as 2 credit cards stacked | As thick as 3 credit cards stacked |
| Power | 1.55 volts | 1.5 volts |
| Kind | Watch battery | Button battery |
Lasts longer: LR521 (about 82% longer)
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No. They’re the same width and power, but SR512SW is thinner. It may wobble a little and runs out about 45% sooner. LR521 is too thick to fit where SR512SW goes.
In a pinch. They’re the same width and power, but SR512SW is thinner. It may wobble a little and runs out about 45% sooner. LR521 is too thick to fit where SR512SW goes.
LR521 (about 82% longer).
| SR512SW | LR521 | |
|---|---|---|
| Diameter | 5.8 mm | 5.8 mm |
| Height | 1.3 mm | 2.1 mm |
| Nominal voltage | 1.55V | 1.5V |
| Typical capacity | 5.5 mAh | 10 mAh |
| Chemistry | Silver oxide | Alkaline |
| Shelf life | 5 yrs | 5 yrs |
| Operating temp | -10 to 60 °C | -10 to 60 °C |