After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.

All that is a waste of time. No matter what you do or how you try the battery will die after about two to two to three years.
Lifehacker had a great article about battery myths recently, one of which was about whether you should drain the battery (tl;dr: no, you really shouldn't, though once in a while is ok - once a month is what used to be recommended, but newer devices like recent iPhones should only do that if you notice the battery meter being weird.)
Five*Smartphone Battery Myths, Explained
I usually run the battery down at the first use till the phone automatically shutoff. I do not know why I do that, but I read somewhere a long time ago (battery university?) while the Li-ion batteries do not have a memory effect (I know that much), the initial conditioning is preferable. So, I do so. But I also know that running down Li-ion batteries completely dry is detrimental to the battery. But the phone automatically shutting down due to low charge is not the same. It just means that the phone's protection circuit is working.
But I rarely do the thing after that. The only reason I ran down the battery, say, below 50%, is to reset its internal circuit to indicate the accurate battery charge reading. Sometimes, even after the over night charge etc, I see the charge did not reach 100%, or other odd showing (but it's rare). When this happens, after running it down a bit (say, 50%) and back it up to 100%, the problem is gone.
I wish Apple had some guidelines on battery management.
