This seems to be a wider issue..
I have a Redmi Note 4 (Mido - Snapdragon SoC) and running MIUI V11.0.2.0 Global stable
(I know, it's not Xiaomi.EU, it1s EOL..) and hell a lot of us are experiencing the same drainage, device almost never enters deep doze (only light), battery level is sinking just like Titanic did..
I reported the issue with bugreport zip attached + I investigated the problem thoroughly I think but I only got BS answers like "use the phone for 3 days and use deep cleaner" and "you have to recalibrate the battery". Hope they hear our voice and will do something.
PS: this is
clearly not a problem of our phones nor their battery, with the official LOS 16 the phone can easily achieve 9.5..10hrs of active usage (
let's call it "SoT" now) with the same apps installed and same usage bahavior and other ppl in my close environment are having the same issue as well (we have a dozen of the same device) and lots of other forums are full of MIUI 11 battery usage related posts for all kind of devices and ROMs across the whole Internet.