How to properly charge a smartphone?

Question

Mobile devices

From time to time I encounter a situation that the phone stops holding a charge. Those. on the face of a strong degradation of the battery in just a year of use. Naturally, every time the thought arises about the wrong charging of the phone, and I again climb into the Internet, read "how to properly charge a smartphone" and once again go nuts because the articles contradict one another. One says that you need to charge with low currents, charging is long, but the battery will last longer, the other says that this kills the battery and you need to charge only with a standard 2A charger. Some write that the phone needs to be charged as little as possible, others often and no more than up to 80-90%. Actually, I'm completely confused. Who really understands the issue, tell me.

Answer 1

In order to charge the phone, you do not need to have two higher educations. This is a consumer device that is designed to be charged at random.
You just have bad luck with phones.