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Home › Can I swap? › SR726SW vs SR731SW
Can I swap?

SR726SW vs SR731SW: can you swap them?

1The short answer2Both ways3Differences4Buy it5Learn more
  1. 1

    The short answer

    NoSR726SW can stand in for SR731SW, but not the other way roundThey’re the same width and power, but SR726SW is thinner. It may wobble a little and runs out about 14% sooner. SR731SW is too thick to fit where SR726SW goes.
    SR726SW+ 1.55V
    SR726SWAs thick as 3 credit cards stacked
    SR731SW+ 1.55V
    SR731SWAs thick as 4 credit cards stacked
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  2. 2

    Both ways round

    Can I put SR731SW where SR726SW goes?No
    Can I put SR726SW where SR731SW goes?In a pinch
  3. 3

    What’s different

    SR726SWSR731SW
    SizeAbout as wide as a peaAbout as wide as a pea Same
    ThicknessAs thick as 3 credit cards stackedAs thick as 4 credit cards stacked
    Power1.55 volts1.55 volts Same
    KindWatch batteryWatch battery

    Lasts longer: SR731SW (about 16% longer)

  4. 4

    Where to buy SR726SW

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    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer 397
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    Amazon searchMulti-packs from any brandSearch Amazon for SR726SW multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell SR726SW
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  5. 5

    Learn more

    About SR726SWAbout SR731SWCheck another pair
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Questions people ask

Can I use SR731SW instead of SR726SW?

No. They’re the same width and power, but SR726SW is thinner. It may wobble a little and runs out about 14% sooner. SR731SW is too thick to fit where SR726SW goes.

Can I use SR726SW instead of SR731SW?

In a pinch. They’re the same width and power, but SR726SW is thinner. It may wobble a little and runs out about 14% sooner. SR731SW is too thick to fit where SR726SW goes.

Which one lasts longer?

SR731SW (about 16% longer).

All the numbers

SR726SWSR731SW
Diameter7.9 mm7.9 mm
Height2.6 mm3.1 mm
Nominal voltage1.55V1.55V
Typical capacity32 mAh37 mAh
ChemistrySilver oxideSilver oxide
Shelf life5 yrs5 yrs
Operating temp-10 to 60 °C-10 to 60 °C
Can I use SR731SW instead of SR726SW?No
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1The short answer2Both ways3Differences4Buy it5Learn more