I did the uninstall exchange, sim and reinstalled sim and exchange,it is hot too,  and now my phone won't take a charge when plugged in! WTF!  I had put in a 100%  battery before bed, plugged in and it was down to 16% when I woke, and now it is plugged in again and it is going down still. 

I'd previously uninstalled exchange, and reinstalled exhange, still had the battery drain in 2 hours.

It shows exchange as 4% so there are others  more than that. Screen and Android OS are the main ones.

I just don't know what to do.