On full 100 percent charge upto 15 percent got 7 plus hours of screen time on a 3 years plus great condition note 9. You can see the image above
Who cares about updates if all works well.
I had terrible reboot crashes and have a different post. Finally @eshank told me to go for the factory Reset.
I could not even take my backups as while connected to Smartswitch the phone kept rebooting. I did Samsung cloud restore on phone itself.
And now it works perfectly like a new phone with all heating, reboot issues gone.🤣🤣
So people if you ever have major issue give it a try.👍
Tks. Now all works like a new phone with no lags or heat and battery life improved. I realized dont do any thing with apps sleep or background etc. I did not fiddle with any of that battery usage, or toggled off adaptive brightness . All works better without touching those.