My wife's Note 4 is playing up.

AA
battery charging is rather slow, less than 10% per hr.

BB
many apps auto started and running in the background

For AA, appreciate proven tips on how to bring some life back to the battery, before we buy a new battery. Phone is about 3 years old now.

For BB, I have tried All-In-One to stop the auto-started apps but later they restarted. Also tried Auto-run Manager but need to root the phone which I prefer not to. Any other ways to stop these annoying apps auto starting?

Many thanks.

I have done a test the other day, comparing my wife's and my son's samsungs.

With 2 diff Samsung chargers and also from PC, my wife's one is definitely slower than my son's (about half the rate).

PC and charger rates are about the same for my wife's at about 3% /hr.