Nexus 5. Battery issues w 6.0.1?

[Advaitom]

Hi All, I have a 2 year old LG Nexus 5 that has never been rooted. Maybe its a coincidence, but since I installed 6.0.1 my battery is draining quickly and takes a long time to charge. Anyone else have this problem? If yes, is there a way to downgrade to 6.0? Some other way to fix this problem? Is there an app that can fix or mitigate battery issues like this? Thanks,