Its nearly 1 month i am facing this problem. Its charged when its completely dead and stay off. And 100 out of 1 its charged when its on only for 10 to 15 minutes. And its not charging fast as it was before. It is updated. If anyone know the solution please tell me. And i have also try to clean charging place but didnt work.
First never get your phone battery lowet than 20 per cent and NEVER fully discharge it.
Second hypotising that the usb port works fine try to use another samsung charger and cable and see if you still have the problem.
If so you may have a damaged/defective usb port
-try another charger
-please clear your your USB Settings (Settings > Apps > tap the 3 dots > tap Show System Apps > tap USB Settings > tap Storage > tap Clear Data)
-restart your phone then check
-if persists, back up then do the factory data reset
if all above fails, please contact Samsung Support to arrange a repair of your phone
I had similar problem but with headphones, it says in the notifications every second Android system usb connecter connected, then the next second it say Android system usb connecter disconnected, been doing that when nothing is plugged into phone. My earbud might work for 1 second then don't work anymore, I bought 2 new pairs still same. Then i tried clearing cache, nothing, forcing up to stop, still nothing. This phone did not fall, nor get exposed to any water. This happened from the last Samsung note 10 plus update. How to fix if solvable