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Home › Can I swap? › AA vs E91
Can I swap?

AA vs E91: can you swap them?

1The short answer2Both ways3Differences4Buy it5Learn more
  1. 1

    The short answer

    YesYes, they’re the same batteryAA and E91 are two names for the exact same battery. Use either one.
    AA
    AAThe same size as an AA
    AA
    E91The same size as an AA
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  2. 2

    Both ways round

    Can I put E91 where AA goes?Yes
    Can I put AA where E91 goes?Yes
  3. 3

    What’s different

    AAE91
    SizeThe same size as an AAThe same size as an AA Same
    LengthThe same size as an AAThe same size as an AA Same
    Power1.5 volts1.5 volts Same
    KindEveryday AA batteryEveryday AA battery

    Lasts longer: Same

  4. 4

    Where to buy AA

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

    Our pickThe exact match, 4-packEnergizer AA 1.5V Battery (4-Pack)
    Check Price on Amazon →
    Best value10-pack, handy to keep in a drawerAA 1.5V Battery Value Pack (10-Pack)
    Check Price on Amazon →
    Other brandDuracell MN1500, the same batteryDuracell MN1500 / AA 1.5V Battery
    Check Price on Amazon →

    Buttons open amazon.com 🇺🇸, picked from your country.

    Get E91 on AmazonAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.
  5. 5

    Learn more

    About AAAbout E91Check another pair
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Questions people ask

Can I use E91 instead of AA?

Yes. AA and E91 are two names for the exact same battery. Use either one.

Can I use AA instead of E91?

Yes. AA and E91 are two names for the exact same battery. Use either one.

Which one lasts longer?

They last about the same.

All the numbers

AAE91
Diameter14.5 mm14.5 mm
Height50.5 mm50.5 mm
Nominal voltage1.5V1.5V
Typical capacity2700 mAh2700 mAh
ChemistryAlkalineAlkaline
Shelf life10 yrs10 yrs
Operating temp-18 to 55 °C-18 to 55 °C
Can I use E91 instead of AA?Yes
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Something wrong or missing? Tell us

1The short answer2Both ways3Differences4Buy it5Learn more