Here's a nearly unedited experience of me replacing the battery in my Nexus 6p! Yes, it can be done with pretty much no risk of damaging the screen. I did it with only a little prep and without fancy tools (though you may want to slow down and do it right as you'll see in the video).
Bottom line: This is a Nexus 6p Battery Replacement that cost me a total of $10 for the battery. I had all the other materials already. So- in my mind that's better than going out and buying a new phone for $900. The phone works great now and I haven't had problems like the Nexus shutting off after reaching 50% battery life.
Quick disclaimer regarding the Nexus 6p Battery Replacement:
This information is offered with no warranty or guarantee of any kind. The creator of this video is not responsible for what you do in any way at any time.
The procedures in this video WILL VOID YOUR WARRANTY if you still have one.
Product Links (A way to support my efforts only, not an endorsement. I participate in the Amazon Affiliate program):
Battery I used http://amzn.to/2p95kod or the kit at http://amzn.to/2FCDgQh
Pick I use: http://amzn.to/2FRMkEk
If you damage the rear camera cover: http://amzn.to/2GmV4Qx or http://amzn.to/2GpctIx
Replace the bottom housing cover (unless you have a gold edition like me): http://amzn.to/2DpvM1c
Sorry so long but I wanted to give you the unfiltered experience. If there's enough demand I'll shorten it but I'm betting there's not a ton of you out there interested in this do-it-yourself project.