My Lumia 930, on the Windows Insider Fast Track started running hot and flattening the battery in about 4 hours, before Christmas after the most recent update.Sad smileThumbs down

I provided feedback but could not find a solution.  Final solution I found that worked was to do a a Factory Reset. I backed up my data first. On reset I let it reinstall my previous apps that were installed etc. SmileThumbs up