So finally… which AA battery is the best?
According to Consumer Reports, it depends. Though cheap alkaline batteries have short lives, they cost a lot less. So if you’re okay with changing the batteries frequently on low-tech devices like flashlights, go with Alkaline to save money.
For high-tech devices… #1 is Energizer Ultimate Lithium.
The longest-lasting for low-tech devices… Duracell Ultra Power.