Friend who is perpetually on her Galaxy S6 was getting very frustrated with battery drain. She found a case with integrated battery that made that go away. Yeah, it's bulkier and heavier, but she doesn't complain. And when she's not on it, and she's not at home, it's in her purse, anyway.
Another friend added such a case to her iPhone. Again, if/when it travels, it's in a bag.
I've looked for a such a case for my Nexus 5x, but it's apparently much too small a market to attract such a third-party product.
Maybe with the enhanced commercialization of the Pixel, it will get such things. But, it's a risk you won't face with a Samsung S series nor an iPhone.
(Plus, the S7 takes a microSD card, once again.
Yeah, the headphone jack. But I think now most people are going to just start making do with Bluetooth. The minority who care for the quality and features Bluetooth lack, are just that, a minority these manufacturers can afford to ignore.)
P.S. The quick charging is nice, though. My 5x can go from 40-ish percent or maybe 50, to over 90 percent charge during a 20-30 minute car ride, using a Pleson brand car charger that supports quick charging.
I used to let my phones drain more thoroughly, or at least drain steadily through a full day, before recharging them. Trying to reduce charging cycle count. Now, I've kind of given up on that and taken to her behavior (somewhat or substantially erstwhile, now that she has the battery case), charging several times a day, when I have the opportunity, and whether or not I have time to let it reach full or near-full charge.
We'll see how long its battery stays in good shape.