re: Are All Battery Brands Equal? If Not Which One Is The Best?

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I bought a 24 pack of Rayovac batteries just because they were a little bit cheaper,

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Sorry you're poor.

But to answer your question - no they aren't the same. Plenty of 3rd party testing proves this. The question becomes is the extra life worth the price. Some of those premium Duracell "quantums" are at least twice the price of Rayovac.

And it depends on what load you are putting them under. They may perform differently running a flashlight compared to something requiring more current.