iPhone Battery Percentage Change after Switch OFF

Hi Friends, I’m new iPhone user (1 month ago),

My battery charge limit I set it to 90%, I charged my phone and it’s almost 88% so I removed my phone from the charger, then I checked my phone battery settings there’s showing mobile heat so charging is hold, battery percentage is 88, then I switch off my phone and switch on after power on the battery percentage showing 91, naan new ah iPhone vangunen, please help me anyone brother, sorry for bad english…

hi bro, not to worry its just a software level measurement which shows as approximate data and automatically adjusts after few minutes of usage. its normal dont worry.