Link for Android Beta Program: https://www.google.com/android/beta
Make sure to backup your stuff!
After some weeks trying out the Android O, I realized that the battery life would benefit from the new operating system but the random shutdowns would occur anyway.
It is still worthwhile but don’t expect it to be the solution to all of your problems.
Android 8 is getting less and less beneficial in terms of battery life, to the point that I’m getting shutdowns at 94%. Don’t update to Android 8.
In this video I discuss how I came to the conclusion that Android O was the best shot to fixing Nexus 6P battery drainage. It won’t make the phone perfect, but sure mitigates the battery consumption.