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Home › Can I swap? › SR43 vs LR1120
Can I swap?

SR43 vs LR1120: can you swap them?

1The short answer2Both ways3Differences4Buy it5Learn more
  1. 1

    The short answer

    In a pinchLR1120 can stand in for SR43, but not the other way roundThey’re the same width and power, but LR1120 is thinner. It may wobble a little and runs out about 66% sooner. SR43 is too thick to fit where LR1120 goes.
    SR43+ 1.55V
    SR43As thick as 6 credit cards stacked
    LR1120+ 1.5V
    LR1120As thick as 3 credit cards stacked
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  2. 2

    Both ways round

    Can I put LR1120 where SR43 goes?In a pinch
    Can I put SR43 where LR1120 goes?No
  3. 3

    What’s different

    SR43LR1120
    SizeAbout as wide as a shirt buttonAbout as wide as a shirt button Same
    ThicknessAs thick as 6 credit cards stackedAs thick as 3 credit cards stacked
    Power1.55 volts1.5 volts
    KindWatch batteryButton battery

    Lasts longer: SR43 (about 193% longer)

  4. 4

    Where to buy SR43

    As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer 386
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    Amazon searchMulti-packs from any brandSearch Amazon for SR43 multi-packs
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    Amazon searchDuracell D386 listings, the same batterySearch Amazon for Duracell D386
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  5. 5

    Learn more

    About SR43About LR1120Check another pair
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Questions people ask

Can I use LR1120 instead of SR43?

In a pinch. They’re the same width and power, but LR1120 is thinner. It may wobble a little and runs out about 66% sooner. SR43 is too thick to fit where LR1120 goes.

Can I use SR43 instead of LR1120?

No. They’re the same width and power, but LR1120 is thinner. It may wobble a little and runs out about 66% sooner. SR43 is too thick to fit where LR1120 goes.

Which one lasts longer?

SR43 (about 193% longer).

All the numbers

SR43LR1120
Diameter11.6 mm11.6 mm
Height4.2 mm2.1 mm
Nominal voltage1.55V1.5V
Typical capacity120 mAh41 mAh
ChemistrySilver oxideAlkaline
Shelf life5 yrs5 yrs
Operating temp-10 to 60 °C-10 to 60 °C
Can I use LR1120 instead of SR43?In a pinch
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1The short answer2Both ways3Differences4Buy it5Learn more