One of the recurring themes when talking about last year's Galaxy S6 was its battery life, where the 2550 mAh cell just couldn't handle a full day of use for many people. Samsung is directly answering complaints in the Galaxy S7 with a solid jump a 3000 mAh battery inside, and the larger-screened Galaxy S7 edge has a considerably bigger 3600 mAh battery as well.

Read: Complete Galaxy S7 and S7 edge specs

That 3000 mAh is about 17 percent larger than the Galaxy S6, and if you'll recall is the same size battery as what's available in the Galaxy Note 5, though this is being done in a much smaller 5.1-inch device. Battery life is hardly an issue on the Note 5, and hopefully that translates to battery life no longer being a problem for the Galaxy S7 either.

In terms of the larger 5.5-inch Galaxy S7 edge, the 3600 mAh battery is 20 percent larger than even the Galaxy S6 edge+, a phone that has a larger 5.7-inch screen. With that extra boost in battery capacity, this just may be the choice for those who want guaranteed full-day battery longevity.

In both phones the additional battery isn't compromising the size of the device, either, with each one coming in at roughly the same thickness as their predecessor. It will take some time to get a real feel for the actual battery life figures of both phones, but we're expecting them to take a nice step above last year's models.