After some unsuccessful upgrade attempts, I restored the factory image. Ran the mediacreation tool to do an inplace upgrade. After the upgrade, I deleted the original recovery partition, moved the new recovery partition to the end of the drive and extended the C drive to about 29GB in size.
Then I updated the chipset and network drivers.
The only issue I am running into is not being able to kill the login password prompt. I set it to not require after sleep. I used netplwiz and also changed the prompt signin timeout to Never. My Dell 3147 is set to never ask for the password. It works, but not the DV8P. Maybe, there is a setting I overlooked.
As for battery life, the idle runs as low as 1.19 watts which is lower than the best with Win 8.1. Sleep still uses about 1/2 percent per hour.
The new Edge browser is very fast.