Horrible battery drain on L640XL for no specific reason

[Windows Central Question]

So, battery life has been driving me nuts ever since I started using W10M. I switched back to 8.1 for a while but updated again. I don't have Skype logged in. Nor do I have many apps running in the background or anything. Battery drain is not that bad while in use, but as soon as I put the phone aside, it starts heating up, and the battery goes crazy. I seriously don't know what else to do.
(.107 + hard reset)

 

[avengerxp]

hppened to me on .71 but after upgrading to .107 it didn't happen. anyway I uninstalled all unwanted apps such as fitbit etc...