So, I've used the same exact charger and cord to charge my last few phones. Once in a while I have a problem where my phone stops charging. For example, last night about 10:30 my phone as at 16% battery. I plugged it in and it started charging. I went to sleep. I woke up this morning (about 4:45), pulled my phone off the charger and went about my morning. Now here we are at 5:20 and I notice my battery is at 29%. It's obvious that it charged some, but not all the way and NOBODY touched it. It was still plugged in when I woke up this morning. Anybody got any ideas what's going on?