I'm here with android P since beta version, lots of things happening. As far as I know there's still one thing that didn't change to save your battery, at the beginning you might feel weird but. When you get used to it, you can't even tell the difference.
Just turn on your blue light Filters.
Yeap just this step it will help saving more than you can imagine.
If this works for you. Let me know in the comments.
Long live Samsung Corp.
For S10 you will need to go to settings and at the very top of the screen in the search field type in blue light filter. Once you see that then all you have to do is tap on it to get to the settings.
How to turn on blue light filter?
Easiest way :
On home screen
Swipe down to open your notification panel
And tap on blue light filter.
If you cant find it, go to button order and you know what to do next 😁
Little work :
Go to setting
Type blue light
And turn it on