One of the things I worry about is the charging port on my Samsung smartphone. The phone is over two years old and it’s been plugged in and unplugged countless times from it’s charging cables. It’s been fine as of now but I’ve seen some of my computer clients smartphones where the charging port came loose or broke completely. I’m doing everything I can to preserve it.
One thing I have done is not use the charging cable to connect it to my computers for transferring files. I found a way to use my internal network with wifi. Cloud storage like dropbox and Mega are also used. And instead of charging it constantly to keep it at 100, I let it get lower before charging.
Another thing I try and do is close all my apps periodically and this preserves my battery. Sometimes when I do this, there are 20 to 30 things running all at once.