having a replaceable battery doesn't make sense? or the omission doesn't?
i like to carry multiples when traveling, heavy usage days, or when there is weak signal. worrying about battery conservation isn't my thing, nor is lugging around a backup charge pack. but 2 extra replaceable batteries for my gs3 isn't much more than an ounce or two and can get me through the worst days. it's a feature i would miss leaving the galaxy family.
not seeing how battery contacts and leads could add measurably to a phone, but i guess every nanometer counts these days. seems that having a swappable back cover would add far more thickness, would contribute to strength issues and would be the bulk of the extra thickness in the replaceable battery equation.