After the last 3 upgrade the settings of battery control have some issues, is not correct anymore. After turning off my phone the settings lose the data so when i turn on again he show the phone os been charged and reset the data so is impossible to understand how much time of usage you have done. Plus i noticed a uge difference of battery life from when tge problem started. I hope i explain myself correct coz English is not my first language, sorry for the errors.