Onto_Neweryeah, I wanted to go at warranty service too because it's not normal at all to drain so much battery doing nothing and all of a sudden. It is clearly a problem. I don't know if it's a software probleme because I reset to factory settings, I installed other versions of android and it did the same, before I had no problem with the battery, it changed overnight. I don't know what causes this drain, but it's not normal. Go to the service and see what they can do for you, but as I said earlier, if it was a software problem, when you go back to factory settings.. it would normally be fixed.. and if it was hardware, it wouldn't fix itself as mine did, so it's too strange.🤔
First of all, @Van_Franzen and @alexandru.sarau thank you for you comments and replies. What I cand see at a glance is that 3-5% is very very different from 40-50%, this being what I am experiencing .. I was hoping for an answer from what I presume to be ASUS representatives here on the forun, but who knows, maybe they will get to my post in the end ... The common part in both your stories is that it fixed itself, how or why .. don't know .. a miracle 🙂 .. I will try to be patient and wait maybe for more comments, but if nothing works, most likely I will use the warranty service because it's absolutely ridiculously what's happening. Thanks again, and thanks in advance for new and pertinent comments.