Well that was a lengthy post hehe
I agree with a lot of the things you say, but also give the benefit of the doubt to all posters. Yes, there's no universal truth to battery life since we all use our devices in different ways, but even if it's a placebo effect, the best way to tell if your phone is better or not is yourself. And in this case, at least for the OP, turning off quick charging seems to make enough of a difference for him to notice! And that's good! Might work for others, might not... Samsung's team is not the only one (unfortunately) that handles the code on these phones, so bugs might happen. It can also be a combination of things happening specifically in the OP's phone that might not be present in mine and that won't make my phone see any difference with Quick Charging... Who knows?!
Truth is, we're all here to try and give our best tips. And turning a switch on and off (especially if you charge at night, where fast charging doesn't really matter that much) is worth the try for some extra battery life, don't you think?
It us spot on when you sat that Samsung is not the only ones poking their dirty hands into the Android book of codes. But never the less, where do one find facts that says fast charging shortens battery life? Look at electric cars. Many run on Li-Ion cells, like a phone. Bare in mind that a battery cell is a battery cell no matter how big it is. Like your phone has just a few cells (batteries are made up of cells with a finite voltage number to produce a battery with the right voltage). Anyway, back to the car, here they work really hard on charging speed. And as it turns out, the only thing stopping the manufacturer is the fact that (here in Norway) the average Joe only has 16A at home. When you pull up to a changing station on the other hang, you see the charging cord is like a fire hose compared to the spagetti you have at home. And after only a few minutes of charging the car it good to go, while as it may take 5hrs to get the same amount of juice at home. Point it, these batteries are incredibly though. And I stand by my word when I call that speed wharging (increased voltage, decreased amps but the same effect in W) is not any more dangerous to your battery than having it in your pocket on a hot day or better yet, in a holder in a car. It is heat that degrades these batteries the most.
That said, again, I belive the OP when he says his phone last longer. I have a Gear S that has it's own battery life will. Some days it use 80% during a day, others 45%. And I can not find out why. But as long as it has 1% left when I go to bed I am OK with it.
I wish I could confirm OP and help him check the battery lifetime, but as described above the only way to do it is having your phone in a strictly controlled state. And also you need more than one day to confirm it, like my Gear S has its own will and will behave as it pleases.
My biggest point is that nobody has shown any documented fact about what faster charging does to a battery in this case. Ergo there is nothing to suggest a shortened lifetime. I just wish ppl would spend more time loving and enjoying this piece of marvelous electronics than they do making up half fact so they can have something to worry about. Yes batteries are not for ever, yes they will die at some point, but so what? If you get a week more out of you battery by having it in a temperature controlled container (read cooling bag), is it worth it? Cuz we are not talking years degrading here. We are talking hours and days at best(my understanding out of all I have read of research on the topic).
Be happy, USE the Note 4. It has a hole in the bottom for a reason. It is so that when you have spent half the day playing with it you can continue to do so with just any USB micro cable. I love it !
Otterman gone fishing
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