AA battery voltage (nominal)

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AA battery voltage - 1.5V alkaline, 1.2V NiMH
AA battery nominal voltage: 1.5 V (alkaline) or 1.2 V (NiMH)

AA alkaline cells have nominal 1.5 V, [source] while AA NiMH rechargeables specify nominal 1.2 V in datasheets. [source]

AA nominal voltages
ChemistryNominal voltage
Alkaline1.5 V [source]
NiMH1.2 V [source]

Sources: Manufacturer datasheets.

FAQ

What is AA alkaline nominal voltage?

1.5 V.

What is AA NiMH nominal voltage?

1.2 V.

Why do rechargeable AAs have lower nominal voltage?

NiMH chemistry has a lower cell voltage than alkaline.