*5)Increased background* activity after an update Your phone is re-optimizing in the background quietly. *4)New features* might be draining the battery silently Background tools like routines or location use can drain more battery. *3)Updates can change* your battery settings You'll need to recheck those optimization toggles. *2)You're probably* using your phone more too New updates often lead to increased screen time. 1)There could be *bugs draining your battery* Not every update is perfectly optimized