Not only are you looking at it completely the wrong way, but Energizers are complete crap for their alkalines (and yes this has been independently confirmed and tested).
You're looking at it from the bottom up (well this shitty battery fits x amount of ma, and duracell fits more, so obviously it's possible). The problem is, the TP2 battery isn't a Kmart battery - it's already the "duracell" equivalent - a top quality OEM cell.
Now if you want to find me a AA battery that packs 30% more ma than a duracell coppertop or panasonic evolta, then we'll talk.
I can't believe the flak I'm taking for trying to help people here. And I can't believe the low level of logic used by those trying to prove me wrong ("ZOMG I bought the battery so I can't be wrong!") We even have people claiming that you need to "cycle" your battery and that "battery life will improve with time"
NO! Please, do some frigging research before making yourself look like even more of a fool.
Is lithium-ion the ideal battery?