Has anyone with an SD S21 Ultra figured out what's causing major battery drain with Android 13 update. I spoke to about 3 people who are all experiencing severe battery drainage plus minor overheating, not everyone else around me does what we do here on XDA and trick out their phone with optimizations. Everyone I know is on plain stock, with stock settings and no ADB optimizations. I on the other hand optimize my phone, did this again waited till it settled and definitely not much changed. My buddy usually has 59% by the end of the day, but now he's seeing 39% by the end of the day. It sounds too me like this is more of an S21 issue not an S22.