Nexus 5 Akku Drain on Lollipop (5.1.1) Workaround

Google Issue 165558 : Workaround

As reported a lot of people have a very poor battery life on Lollipop.
I had the issues, but found some settings you can change to get better battery life.
These changes worked for me, you'll have to check for yourself if they help or not.