Re: My Battery lasts all day...
If you want more battery life, get a case that has an integrated battery and make YOUR phone thicker and heavier! I don't want the extra size, because I was getting two and often THREE days of battery life from my 6S Plus when it was new. Now that it is two years old (and probably I'm using it a bit more heavily these days) a good day's use drains it under 50% so now I charge nightly, but the idea that charging every other day is somehow a major improvement over nightly charging is ludicrous. It takes literally seconds to plug it in when you go to bed!
Why do people want to change the design of a phone to satisfy THEM, when simple solutions exist that they can custom tailor (i.e. depending on the thickness/capacity of the battery case) to meet their exact needs? I'm sure there are people out there who are on their phone pretty much 12-14 hours a day for whom an extra couple millimeters of thickness would not be nearly enough. Would those suggesting "just add a millimeter or two" be OK with fully doubling the thickness & weight to satisfy the real power users out there?
Using a double thickness phone with a 10000 mAH battery I'd probably only need to charge it weekly when it was new. You know how much of an improvement weekly charging would make in my life? Zero.