why is my battery is draining to fast?

[WPCentral Question]

Since I downloaded windows 10 insider on my Lumia 1520 my mobile even after two months or so is not working as a normal mobile . The worst is the battery it does not last 2 hours if I am using it. Also it starts the screen to go up and down and also the mobile gets very hot
Does any one knows is it can ever be fixed?
I love my windows phone but this is make me think to jump ship.