The Galaxy S 6 will most likely be a lot thinner than the Galaxy S 5, but one major downside could be the battery. Not only will it be non-removable, it actually might be smaller than its predecessor.
One would think that Samsung could fit the new Galaxy S 6 with at least the same size battery as the S5 since battery technology keeps evolving, but unfortunately that won’t be the case. It’s expected to come in at 2600 mAh as opposed to 2800 mAh on the S5, which is about 7% less.
Now the fact that it’s going to be smaller doesn’t have to be a bad thing. The new Exynos 7 processor might add more efficiency in that overall battery life might not suffer at all. Still, the bottomline is that if you are running out of juice, you will not be able to swap batteries. Also, since a Qualcomm chip won’t be present, the S6 won’t feature quick charging capabilities to get you out of trouble faster.