Go into setting and turn digital wellbeing usage off then go to all apps data usuage tracking and click on show system apps then turn off all of them that you do not need on then go disable the built in Facebook app... And youuuu come back here and tell me that that your phone now has amazing battery and no more performance jitters/laggs ... its mad.. even my built in apps open without that nano second of loading up..tryyyy ittt..... if you dont see a difference turn them back on..but for me i can see it and feel it