My device got one ui 7 on 11 june for the first 2 days till 13th june i was also facing battery drain issue but after that it has automatically Adapted and battery drain issues was fixed automatically... Firstly i optimized my device for 2 days using...
Bro i think this depends on device to device i use m33 5g some users are also saying battery drain issues but my m33 5g battery is working perfectly fine without any bugs u can see the proof
