Phone running in background, battery drain

[Rose_vietnam]

Recently my phone's baterry is draining so fast, checked in baterry care and found Phone is running in background and impossile to turn off as in the screenshots attached.
Please helpe to solve this problem.

 

[Rukbat]

If the phone isn't running in the background (and in Linux [which is the operating system that Android runs on], an app can be loaded and put to sleep, using no battery at all), when you get a phone call, Phone has to be loaded, which drains battery, takes time, and you may miss the call (since you won't hear a ring until Phone is fully loaded and running - waking it with a signal that says "the phone is ringing" takes microseconds).

Over 18 hours from 100% to 0% (what the graph is telling you) isn't bad. (Of course, you should never discharge a lithium battery lower than 40%, or charge it to more than "as soon as it shows 100%", which is probably between 95% and 98%. If the charger [the chip in the phone - what you plug into the wall is just a 5 Volt power supply] goes bad, it could keep charging a fully charged battery, heating it enough to boil all the electrolyte out of it - or even cause a fire or an explosion. Lithium batteries weren't chosen for safety, they were chosen for weight. [And if they could make batteries using helium or hydrogen, they would.])

 

[Rose_vietnam]

I know the phone must be running in background but something still wrong, it consumes more power than before. Perhaps because I use a separate 4g sim?

 

[mustang7757]

I know the phone must be running in background but something still wrong, it consumes more power than before. Perhaps because I use a separate 4g sim?

That's a possibility