I would be wary using that method. Looking at the comments, one was posted before 4.4.2, 4.4.3 or 4.4.4 was released, so it is probably an older guide meant to be used with 4.4 only. The other comment (yeah, there are only two) asked if it works with 4.4.2, but no answer was given. Attempting this will likely cause you to brick, or set your phone up to brick upon an update. As has been said before, you can take the risk, but I think most everyone here would suggest that you work out the battery issues you are having with KitKat via a different method.
What KJ edited his post to say.
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Moto X - Navy Blue with Silver Accents, Bootloader Unlocked, Rooted, Xposed (How do you like them apples, VZW?)