mobile

Hi i'm a noob (ex-apple fanboy) i just got my first android device 2 weeks ago and cuz i wanted to run obb files for games on my external sd i rooted my device.then i flashed xposed to my phone using twrm recovery and installed xposed and the obb to sd module.Finally got it to work after much frustration until something strange happened.I went to sleep with my device at about 50 or 60% battery level and when i woke up my phone was dead.I was shocked.anyways luckily i did a backup before flashing xposed and am now currently restoring the backup.Cn xposed be the culprit here? this has never happened until i flashed xposed.I also noticed that my battery was really going down fast and when i checked power settings android system was using up 100% battery .Sense home too was using up a lot and ive never seen this happen before until now.Please advice me.I use an unlocked HTC One M8 with a Stock rom and TWRM recovery on lollipop 5.0.1