I have experienced battery drain ever since I used Maps for driving directions three days ago. Once I reached my destination, I turned off location. Yesterday, my device was on the counter for three hours. I only checked it a couple of times, but I did not open any apps. The battery drained from 85% to 15% during that time. I have checked app usage and nothing is requiring that much usage of the battery. As the battery drains, my phone is very hot. Please help.