Hi all,
I have sort of a combination of everyone's problems.
Battery drains very quickly from 90% to 50%, then mobile network stops working, and then the phone suddenly shuts down. Sometimes I can turn it back on with 15% baterry life, sometimes with 1% and another times it doesn't even turn back on anymore until I plug in the charger. While charging I get a "Charging from USB" much more often than "Charging over AC" (I don't know if it's a USB cable issue).
I had the "optimization apps" phase multiple times before (overheating the phone too), sometimes twice on the same day. I had the red light of death a while ago too and I'm not sure if there is any relation with my problem. I haven't done any software or hardware changes, only the normal upgrades from Google and all of this definitely started after Lollipop upgrade.
Going to change the battery now for a new one that I just bought.
Hopefully it will solve the problem, I'll post an update latter.
Also, I don't have root access to my phone and I don't really know how this would help to solve this problem. Can anyone explain it?