I was also facing same issue but after recent update my phone seems to be normal like I can easily use phone more than 24 hours in sigle charge I also tried above steps were helpful for battery life.
Launcher is an application using this you can change your home screen style icons style and many more. I am using 'Nova Launcher' because I'm comfortable with stock android look. you can download that from play store. in latest update it supports ful...
