I had an interesting experience a couple of weeks ago. I woke up in the morning and found that my phone is almost completely drained while it was plugged into the outlet all night. I then tried another outlet and after another no-go I checked to make sure I have electricity, which I did. I ended up restarting the phone and it magically started charging again. I thought nothing of it until that same morning I got to my car and was unable to unlock it via key fob. However, it started working again when I tried it at my work's parking lot. Maybe just a coincidence.