Can someone tell how much screen on time galaxy note 9 should give?? please any note 9 user here?? because i am getting 5 hours of SOT and my phone is 1.5 year old and this is my brother's phone and i did all the possible software solutions to solve ...

Hello everyone,i am facing a very fast battery drain and i did all the possible things which can solve this problem but still the problem is not solved!from the charge of 100% its last only for 4 to 4.5 hours!if anybody knw what will be the solution...