I recommend Energizers. Mainly because Energizer offers Lithium AA's, but also because they publish the technical specs of their batteries, including capacity and discharge curves. It's nice to know what your buying.
An interesting note--when the e2's originally hit the market, they carried the same mAh ratings as the regular Energizers. Checking the site now, I see that the ratings of the e2's have been bumped up. 3135mAh v. 2850mAh for a AA (10% more). Of course, the Lithium AA's are rated at 2900mAh, but that's at a constant 200mA drain, as opposed to a 25mA drain for the alkalines...
Lithiums are much better in high-drain devices. They may not last any longer than alkalines in low-drain devices, but they sure do weigh a lot less and have better shelf life, and for survival gear, that's a very good thing.
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Gemma Seymour (she/her) @gcvrsa