Battery drop when not in use.
Hello , i'm on an investigation why did my phone died last night. Basically i left it on 33% and in the morning the phone was completely dead! Usually it never took more than 15% overnight. I was unable to determinate the problem via BBS because as you may know BBS doesn't really work on 4.4 Kitkat (even if set as system app). The only thing i can show you is the build-in battery monitor graph. See the red section - no screen times , no waking , no GPS , no Wi-Fi but the graph is still going down. I always keep an eye on my battery stats and overal phone health but this is the first time i'm experiencing such issue.
Samsung Galaxy SII GT-i9100
Cyanfox 2.0.2 w/ Android 4.4.2 Kitkat