battery is new , was installed few months ago and its no coincidence as soon installed HyperOS its gone worse and seen few others mentioning the battery is worse on Mi11 with HyperOSi think that it might be a battery issue since no body complains about battery so far, they both cleaned and dirty flashed the rom
I'll give it another week if no hyperOS update I'll install back Miui 14 and that will confirm it