Battery draining - how to stop/minimize

That looks like the cellular use, not a 'radio' like over the airwaves for music or talk.

That is still called radio, because it is using radio waves.

But on a device like this it is the use of the phone.

The recent change of cellular technology can cause the useage to be higher if you are in a fringe service area.
I am not sure of the scheduled technology changes in your country, but 3G is going away fast here.
Now everything is 4G LTE or 5G, and I am in an area with poor reception on those bands.
Therefore my device uses more power searching for and maintaining a signal.

This may also be your issue.

 

It is in the radio frequencies, not just because of its called "Radio" it deals with more or less the frequencies, but yeah you have a massive wad of mobile data using more and more, be able to shut off the frequent apps every time you go do something new to them.

 

None of those changes would make a difference most likely.

Everything is going to be LTE nowadays.

Anyway, the update may have something to do with it.

Check Developers Options to see Running Services.

Here you will see a better breakdown of what is running and how much memory it uses.

 

Thanks bro!