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Home › Can I swap? › 17650 vs CR2/3A
Can I swap?

17650 vs CR2/3A: can you swap them?

1The short answer2Both ways3Differences4Buy it5Learn more
  1. 1

    The short answer

    NoNo, don’t swap theseThey give different amounts of power (3.7 volts vs 3 volts). The wrong one can damage your device or simply won’t work.
    17650
    17650A bit bigger than an AA
    CR2/3A
    CR2/3AShort and chunky, about 3.4 cm long
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  2. 2

    Both ways round

    Can I put CR2/3A where 17650 goes?No
    Can I put 17650 where CR2/3A goes?No
  3. 3

    What’s different

    17650CR2/3A
    SizeA bit bigger than an AAShort and chunky, about 3.4 cm long Same
    LengthA bit bigger than an AAShort and chunky, about 3.4 cm long
    Power3.7 volts3 volts
    KindRechargeable flashlight batteryCamera & alarm battery

    Lasts longer: CR2/3A (about 14% longer)

  4. 4

    Where to buy 17650

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

    Amazon searchEnergizer listings, any pack sizeSearch Amazon for Energizer 17650
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    Amazon searchMulti-packs from any brandSearch Amazon for 17650 multi-packs
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    Amazon searchDuracell listings, the same batterySearch Amazon for Duracell 17650
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    Search Amazon for CR2/3AAs an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.
  5. 5

    Learn more

    About 17650About CR2/3ACheck another pair
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Questions people ask

Can I use CR2/3A instead of 17650?

No. They give different amounts of power (3.7 volts vs 3 volts). The wrong one can damage your device or simply won’t work.

Can I use 17650 instead of CR2/3A?

No. They give different amounts of power (3.7 volts vs 3 volts). The wrong one can damage your device or simply won’t work.

Which one lasts longer?

CR2/3A (about 14% longer).

All the numbers

17650CR2/3A
Diameter17.0 mm17.0 mm
Height65.0 mm33.5 mm
Nominal voltage3.7V3.0V
Typical capacity1400 mAh1600 mAh
ChemistryLithium-ion rechargeableLithium manganese dioxide
Shelf life3 yrs10 yrs
Operating temp-20 to 60 °C-40 to 60 °C
Can I use CR2/3A instead of 17650?No
Search Amazon for 17650As an Amazon Associate, KnowYourBatteries.com earns from qualifying purchases.

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1The short answer2Both ways3Differences4Buy it5Learn more